Document:

Exhibit 10.21

                           CONVERTIBLE PROMISSORY NOTE

$35,562.99                                                         July 19, 2004
                                                                   Dallas, Texas

         FOR  VALUE  RECEIVED,  the  undersigned,  MedSolutions,  Inc.,  a Texas
corporation (the " the Maker"),  hereby  unconditionally  promises to pay to the
order of Don McAfee,  an individual and resident of the State of Washington (the
"Payee"), at such place as designated by the Payee, or at such other place or to
such other party or parties as may be designated by the Payee from time to time,
in  lawful  money of the  United  States of  America,  the  principal  amount of
$35,562.99  (the  "Principal  Amount"),  secured by certain of the assets of the
Maker  as  described  in each of the  Security  Agreement  and the Deed of Trust
entered  into by the Maker and the Payee and dated as of the date  hereof,  with
simple interest at an annual rate of 10.0%.

         1.  This  Convertible  Promissory  Note (the  "Note")  shall be due and
payable in 27 monthly  payments of  principal  and  interest on the first day of
each month,  commencing on August 19, 2004,  and each in the amount of $1,476.34
(an  "Installment"),  with the final  Installment  due on October  19, 2006 (the
"Maturity  Date");  provided,  that each  such  Installment  shall be  deposited
directly,  by means of an Automated  Clearing House (ACH), into the Payee's bank
account, as may be designated by the Payee. Each date on which a payment is due,
including the Maturity  Date,  shall be referred to herein as a "Payment  Date";
provided,  however, that if a Payment Date should fall on a Saturday, Sunday, or
bank holiday, then the Payment Date shall be the next business day.

         2. Notation of  Indebtedness  and Payments.  The Payee is authorized to
record the date and amount of the  indebtedness  evidenced by this Note, and the
date and  amount of each  payment  and  prepayment  of  principal  hereof on any
schedule  annexed hereto and made a part hereof,  or on a  continuation  thereof
which shall be attached  thereto and made a part hereof,  and any such  notation
shall  be  conclusive  and  binding  for all  purposes  absent  manifest  error;
provided, however, that failure by the Payee to make any such notation shall not
affect the obligations of the Maker hereunder.

         3.  Prepayment.  This Note is subject to prepayment in whole or in part
at any  time or from  time to  time,  without  premium  or  penalty  of any kind
whatsoever. All partial prepayments shall be applied first to accrued but unpaid
interest and then to the outstanding principal amount of this Note.

         4. Default.

         (a) Each of the following shall  constitute an "Event of Default" under
this Note:

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                  (i) The Maker  shall fail to pay when due any  Installment  or
         any other amount due hereunder in the manner provided herein,  and such
         default shall continue unremedied for a period of 10 business days; or

                  (ii) A substantial  part of any of the  operations or business
         of the  Maker  is  suspended,  other  than in the  ordinary  course  of
         business, which suspension has a material adverse effect on the Maker's
         financial condition; or

                  (iii) The Maker commences any case, proceeding or other action
         relating to it in  bankruptcy or seeking  reorganization,  liquidation,
         dissolution,   winding-up,   arrangement,    composition,   compromise,
         readjustment  of its debts or any other  relief  under any  bankruptcy,
         insolvency,  reorganization,   liquidation,  dissolution,  arrangement,
         composition,  compromise, readjustment of debt or similar act or law of
         any jurisdiction,  now or hereafter existing,  or consents to, approves
         of or acquiesces  in, any such case,  proceeding  or other  action,  or
         applies for a receiver, trustee or custodian for itself or for all or a
         substantial  part of its  properties or assets,  or makes an assignment
         for the benefit of  creditors,  or fails  generally to pay its debts as
         they mature or admits in writing its inability to pay its debts as they
         mature, or is adjudicated insolvent or bankrupt; or

                  (iv)  There  is  commenced  against  the  Maker  any  case  or
         proceeding,  or  any  other  action  is  taken  against  the  Maker  in
         bankruptcy  or  seeking   reorganization,   liquidation,   dissolution,
         winding-up, arrangement,  composition,  compromise, readjustment of its
         debts  or  any  other   relief   under  any   bankruptcy,   insolvency,
         reorganization,  liquidation,  dissolution,  arrangement,  composition,
         compromise,  readjustment  of  debt  or  similar  act  or  law  of  any
         jurisdiction,  now or  hereafter  existing;  or  there is  appointed  a
         receiver,  trustee  or  custodian  for  the  Maker  or  for  all  or  a
         substantial  part of its  properties  or  assets;  or there is issued a
         warrant  of  attachment,  execution  or  similar  process  against  any
         substantial part of the properties or assets of the Maker, and any such
         event continues for 90 days undismissed, unbonded or undischarged.

         (b) If any Event of Default shall have occurred and be continuing,  the
Payee may,  by written  notice to the Maker,  declare  this Note,  all  interest
hereon and all other amounts,  if any,  payable  hereunder or in respect of this
Note to be  forthwith  due and  payable,  whereupon  they  shall  become  and be
forthwith  due and  payable,  without  presentment,  demand,  protest or further
notice  of any kind,  all of which are  hereby  expressly  waived by the  Maker.
Notwithstanding  the  foregoing,  upon the  occurrence  of any of the  events or
conditions  described in  subsection  (iii) or (iv) of Section 4(a) above,  this
Note, all interest hereon and all other amounts, if any, payable hereunder or in
respect  of this Note shall  immediately  become due and  payable,  without  any
requirement on the part of the Payee to give notice, or make declaration, of any
kind regarding such Event of Default and without presentment, demand, protest or
any  other  requirement  on the  part of the  Payee,  all of  which  are  hereby
expressly waived by the Maker.

         (c) From and after the  occurrence of any Event of Default,  and for so
long as such Event of Default shall  continue,  the unpaid  principal  amount of

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this Note shall  bear  interest  at a rate per annum  equal to the lesser of (i)
18%, or (ii) the Highest Lawful Rate (as defined below), payable on demand.

         5. Waiver of Certain  Demands and  Notices.  Presentment  for  payment,
demand, notice of dishonor, protest, notice of protest and all other demands and
notices in connection  with the delivery,  performance  and  enforcement of this
Note are hereby expressly waived by the Maker.

         6.  Payment of Court  Costs.  If this Note is placed in the hands of an
attorney for collection,  or if it is collected  through any legal  proceedings,
the Maker agrees to pay court costs,  reasonable attorneys' fees and other costs
of collection of the holder hereof.

         7.  Usury.  It is the  intention  of the Maker to conform  strictly  to
applicable  usury laws now or hereafter in force,  and therefore all  agreements
between the Maker and the Payee are expressly  limited so that in no contingency
or event  whatsoever,  whether by reason of advancement of the proceeds  hereof,
acceleration  of maturity of the unpaid  principal  balance hereof or otherwise,
shall  the  amount  paid  or  agreed  to be  paid to the  Payee,  for  the  use,
forbearance  or  detention  of the money to be  advanced  hereunder  exceed  the
highest  lawful rate  permitted by applicable  law.  Regardless of any provision
contained  herein,  or  in  any  other  documents  or  instruments  executed  in
connection  herewith,  the Payee shall never be entitled to receive,  collect or
apply,  as  interest  hereon,  any amount in excess of the  Highest  Lawful Rate
(hereinafter  defined)  and in the event the Payee ever  receives,  collects  or
applies,  as  interest,  any such  excess,  such amount which would be excessive
interest shall be deemed a partial prepayment of principal and treated hereunder
as such;  and, if the principal  hereof is paid in full,  any  remaining  excess
shall be refunded to the Maker. In determining  whether or not the interest paid
or payable, under any specific contingency, exceeds the Highest Lawful Rate, the
Maker and the Payee shall, to the maximum extent permitted under applicable law,
(a) characterize any nonprincipal  payment as an expense,  fee or premium rather
than as interest, (b) exclude voluntary prepayments and the effects thereof, and
(c) spread the total amount of interest  throughout the entire contemplated term
hereof;  provided  that if the  interest  received  for  the  actual  period  of
existence  hereof  exceeds the Highest Lawful Rate, the Payee shall either apply
or refund to the Maker the amount of such excess as herein provided, and in such
event the Payee shall not be subject to any  penalties  provided by any laws for
contracting for, charging or receiving  interest in excess of the Highest Lawful
Rate. As used in this Note, the term "Highest  Lawful Rate" means,  at any given
time during  which  indebtedness  shall be  outstanding  hereunder,  the maximum
nonusurious  interest rate, if any, that at any time or from time to time may be
contracted  for,  taken,  reserved,  charged  or  received  on the  indebtedness
evidenced by this Note under the laws of the United States and applicable  state
law currently in effect or, to the extent allowed by law, under such  applicable
laws of the United  States and  applicable  state law may hereafter be in effect
and which allow a higher maximum nonusurious  interest rate than applicable laws
now allow,  in any case after  taking into  account,  to the extent  required by
applicable law, any and all relevant payments or charges under this Note and any
documents executed in connection herewith.

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         8. Conversion.

         (a) Subject to and upon  compliance with the provisions of this Section
8, the Payee shall have the right (the "Conversion  Right"),  at its option,  at
any time and from time to time,  subject to the "Option" (as defined below),  to
convert all or any portion of the  outstanding  principal  amount of and accrued
but unpaid interest on this Note into the number of fully paid and nonassessable
shares of common  stock of the  Maker,  par value  $.001 (the  "Common  Stock"),
obtained by dividing (i) the amount of this Note to be so converted, by (ii) the
Conversion  Price. For purposes of this Note, the term "Conversion  Price" means
$1.50,  as adjusted from time to time pursuant to the provisions of this Section
8.

         (b) In order to exercise the  conversion  right  provided in subsection
(a) above,  the Payee shall notify the Maker in writing (a "Conversion  Notice")
that the Payee elects to convert this Note or a specified  portion thereof,  and
the Payee shall contemporaneously surrender this Note at the office of the Maker
for cancellation. Unless the shares issuable upon conversion are to be issued in
the name of the Payee, the Conversion Notice shall be accompanied by instruments
of transfer,  in a form reasonably  satisfactory to the Maker,  duly executed by
the Payee or its duly  authorized  attorney and an amount  sufficient to pay any
transfer  or  similar  tax (or  evidence  reasonably  satisfactory  to the Maker
demonstrating  that such taxes have been paid).  The Conversion Right is subject
to the option of the Maker (the "Option"),  upon receipt of a Conversion Notice,
to pay the then-outstanding principal amount and any accrued but unpaid interest
theron  in full to the  Payee  within  30 days of the  date on which  the  Maker
receives  the  Conversion  Notice,  thereby  effectively  canceling  the Payee's
Conversion Right.

         Provided  that the Maker does not exercise  its Option,  as promptly as
practicable  after the expiration of such 30-day  period,  and the compliance by
the Payee with any other  conditions set forth in this subsection (b), the Maker
shall issue and shall deliver to the Payee,  or otherwise in accordance with the
Payee's written instruction, (i) a certificate or certificates for the number of
full  shares  of  Common  Stock  issuable  upon the  conversion  of this Note in
accordance with the provisions of this Section 8 (and any fractional interest in
respect of a share of Common Stock arising upon such conversion shall be settled
as provided in subsection (c) of this Section 8), and (ii) if applicable,  a new
Note of like tenor in the original principal amount equal to the portion of this
Note that has not been so converted.

         Each  conversion  of this Note  shall be  deemed to have been  effected
immediately  prior to the close of business on the date on which the  Conversion
Notice is  received  by the Maker.  The person or persons in whose name or names
any certificate or certificates for the shares of Common Stock issuable upon any
conversion  of this Note shall be deemed to have become the holder or holders of
record of the shares represented  thereby at the time and on the date determined
in accordance  with the first sentence of this  paragraph,  and such  conversion
shall be at the Conversion Price in effect at such time on such date. All shares
of Common Stock  delivered  upon  conversion of this Note shall upon delivery be
duly and validly issued and fully paid and nonassessable.

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         (c)  No  fractional  shares  of  Common  Stock  shall  be  issued  upon
conversion of this Note.  Instead of any fractional  shares of Common Stock that
would  otherwise be issuable upon conversion of this Note, the Maker shall pay a
cash  adjustment in respect of such  fractional  share in an amount equal to the
same  fraction of the current  market price (as defined in  subsection  (d)(iii)
below)  per  share of  Common  Stock  at the  close  of  business  on the day of
conversion.

         (d) The  Conversion  Price is subject to  adjustment  from time to time
upon the occurrence of any of the events  specified in this  subsection (d). For
the purpose of this subsection (d), "Common Stock" means shares now or hereafter
authorized  of any class of common stock of the Maker and any other stock of the
Maker,  however  designated,  that has the right (subject to any prior rights of
any class or series of preferred  stock) to participate in any  distribution  of
the assets or earnings of the Maker without limit as to per share amount.

                  (i) In case  the  Maker  shall  (A) pay a  dividend  or make a
         distribution  in  shares  of  Common  Stock  or other  securities,  (B)
         subdivide its outstanding  shares of Common Stock into a greater number
         of shares,  (C) combine its  outstanding  shares of Common Stock into a
         smaller  number  of  shares,  or (D) issue by  reclassification  of its
         shares  of  Common  Stock  other  securities  of the  Maker,  then  the
         Conversion  Price in  effect  at the time of the  record  date for such
         dividend or of the effective date of such  subdivision,  combination or
         reclassification,  and/or the number and kind of securities issuable on
         such date, shall be proportionately adjusted so that the holder of this
         Note  thereafter  converted  shall be entitled to receive the aggregate
         number  and kind of shares of Common  Stock (or such  other  securities
         other  than  Common  Stock)  of the Maker  that,  if this Note had been
         converted  immediately  prior to such date, the holder would have owned
         upon such  exercise  and been  entitled  to  receive  by virtue of such
         dividend, subdivision, combination or reclassification. Such adjustment
         shall be made successively whenever any event listed above shall occur.

                  (ii) In the event that the Maker  shall fix a record  date for
         the making of a distribution to all holders of Common Stock  (including
         any such distribution made in connection with a consolidation or merger
         in which the Maker is the surviving  corporation) of cash, evidences of
         indebtedness  or  assets,  or  subscription  rights  or  warrants,  the
         Conversion  Price to be in  effect  after  such  record  date  shall be
         determined by multiplying  the Conversion  Price in effect  immediately
         prior to such record date by a fraction,  the  numerator of which shall
         be the current  market  price per share of Common  Stock on such record
         date,  less the amount of cash so to be  distributed or the fair market
         value (as  determined  in good  faith  by,  and  reflected  in a formal
         resolution  of, the Board of  Directors of the Maker) of the portion of
         the assets or evidences of  indebtedness  so to be  distributed,  or of
         such subscription rights or warrants, applicable to one share of Common
         Stock,  and the denominator of which shall be such current market price
         per share of Common Stock.  Such adjustment shall be made  successively
         whenever  such a record  date is  fixed;  and in the  event  that  such
         distribution  is not so  made,  the  Conversion  Price  shall  again be
         adjusted  to be the  Conversion  Price  that would then be in effect if
         such record date had not been fixed.

                  (iii) For the purpose of any  computation  under any paragraph
         of this  subsection (d), the "current market price" per share of Common
         Stock on any date shall be the per share  price of the Common  Stock on

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         the trading day immediately  prior to the event requiring an adjustment
         hereunder  and shall be: (A) if the principal  trading  market for such
         securities is a national or regional securities  exchange,  the closing
         price on such  exchange on such day; or (B) if sales  prices for shares
         of Common Stock are reported by the NASDAQ National Market System (or a
         similar  system then in use), the last reported sales price so reported
         on such day; or (C) if neither (A) nor (B) above are applicable, and if
         bid and ask  prices  for  shares of Common  Stock are  reported  in the
         over-the-counter  market  by NASDAQ  (or,  if not so  reported,  by the
         National  Quotation  Bureau),  the  average of the high bid and low ask
         prices so reported on such day. Notwithstanding the foregoing, if there
         is no reported closing price, last reported sales price, or bid and ask
         prices,  as the case may be, for the day in question,  then the current
         market  price shall be  determined  as of the latest date prior to such
         day for which such closing price, last reported sales price, or bid and
         ask prices,  as the case may be, are available,  unless such securities
         have not been traded on an exchange or in the  over-the-counter  market
         for 30 or more days immediately prior to the day in question,  in which
         case the current market price shall be determined in good faith by, and
         reflected  in a formal  resolution  of, the Board of  Directors  of the
         Maker.

                  (iv) Notwithstanding any provision herein to the contrary,  no
         adjustment  in the  Conversion  Price  shall be  required  unless  such
         adjustment  would require an increase or decrease of at least 1% in the
         Conversion  Price;  provided,  however,  that any adjustments  which by
         reason of this  subsection  (v) are not  required  to be made  shall be
         carried  forward and taken into account in any  subsequent  adjustment.
         All calculations under this subsection (d) shall be made to the nearest
         cent or the nearest one-hundredth of a share, as the case may be.

                  (v)  In  the  event  that  at  any  time,  as a  result  of an
         adjustment made pursuant to subsection  (d)(i), the holder of this Note
         thereafter  converted  shall  become  entitled to receive any shares of
         capital  stock  of  the  Maker  other  than  shares  of  Common  Stock,
         thereafter  the  number  of  such  other  shares  so  receivable   upon
         conversion  of this Note shall be subject  to  adjustment  from time to
         time in a manner and on terms as nearly  equivalent as  practicable  to
         the provisions  with respect to the shares of Common Stock contained in
         this subsection (d), and the other  provisions of this Note shall apply
         on like terms to any such other shares.

                  (vi) If the Maker merges or consolidates  into or with another
         corporation or entity, or if another  corporation or entity merges into
         or with the  Maker  (excluding  such a merger in which the Maker is the
         surviving or  continuing  corporation  and which does not result in any
         reclassification,   conversion,   exchange,   or  cancellation  of  the
         outstanding  shares of Common Stock), or if all or substantially all of
         the assets or business of the Maker are sold or  transferred to another
         corporation,   entity,  or  person,   then,  as  a  condition  to  such
         consolidation,  merger, or sale (a "Transaction"),  lawful and adequate
         provision  shall be made whereby the holder of this Note shall have the
         right from and after the  Transaction  to receive,  upon  conversion of
         this Note and upon the terms and  conditions  specified  herein  and in
         lieu of the shares of the Common Stock that would have been issuable if
         this Note had been fully converted  immediately before the Transaction,
         such shares of stock,  securities,  or assets as such holder would have
         owned  immediately  after the  Transaction if such holder had converted
         this Note immediately before the effective date of the Transaction. The

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         Maker   shall  not  effect   any   Transaction   unless   prior  to  or
         simultaneously with the consummation thereof the successor corporation,
         entity,  or  person  (if  other  than  the  Maker)  resulting  from the
         Transaction  or  purchasing  assets or the business of the Maker in the
         Transaction  shall  assume by  written  instrument  the  obligation  to
         deliver to the holder of this Note such shares of stock, securities, or
         assets as, in accordance with the foregoing provisions, such holder may
         be entitled to receive.

                  (vii) In case any  event  shall  occur as to which  the  other
         provisions of this  subsection (d) are not strictly  applicable but the
         failure to make any adjustment  would not fairly protect the conversion
         rights  set  forth  in  this  subsection  (d) in  accordance  with  the
         essential  intent and principles  hereof,  then, in each such case, the
         Maker shall  effect such  adjustment,  on a basis  consistent  with the
         essential intent and principles  established in this subsection (d), as
         may be necessary to preserve,  without dilution,  the conversion rights
         represented hereby.

         (e) The Maker agrees at all times to reserve and hold  available out of
the aggregate of its authorized  but unissued  Common Stock the number of shares
of its Common Stock  issuable upon the full  conversion of this Note.  The Maker
further  covenants  and  agrees  that all  shares  of Common  Stock  that may be
delivered  upon the conversion of this Note will,  upon delivery,  be fully paid
and  nonassessable  and free  from all taxes and  mortgages,  pledges,  security
interests,  encumbrances,  liens or  charges  of any kind  with  respect  to the
issuance thereof hereunder.

         (f) Upon any adjustment of the Conversion  Price pursuant to subsection
(d) of Section 8, the Maker shall promptly  thereafter  cause to be given to the
holder of this Note written notice of such adjustment. Such notice shall include
the Conversion  Price after such  adjustment,  and shall set forth in reasonable
detail  the  Maker's  method  of  calculation  and the  facts  upon  which  such
calculations  were  based.  Where  appropriate,  such  notice  shall be given in
advance  and  included  as a part of any notice  required  to be given under the
other provisions of this subsection (f).

         In the  event of (i) any  fixing  by the  Maker of a record  date  with
respect to the holders of any class of  securities  of the Maker for the purpose
of  determining  which  of such  holders  are  entitled  to  dividends  or other
distributions, or any rights to subscribe for, purchase or otherwise acquire any
shares of capital stock of any class or any other securities or property,  or to
receive any other right,  or (ii) any capital  reorganization  of the Maker,  or
reclassification  or  recapitalization  of the capital stock of the Maker or any
transfer of all or substantially  all of the assets or business of the Maker to,
or  consolidation  or  merger  of the Maker  with or into,  any other  entity or
person,  or (iii) any voluntary or involuntary  dissolution or winding up of the
Maker,  then and in each such event the Maker shall give the holder of this Note
a written  notice  specifying,  as the case may be, (A) the record  date for the
purpose of such  dividend,  distribution,  or right,  and stating the amount and
character of such dividend, distribution, or right, or (B) the date on which any
such    reorganization,     reclassification,     recapitalization,    transfer,
consolidation, merger, conveyance, dissolution, liquidation, or winding up is to
take  place and the  time,  if any is to be fixed,  as of which the  holders  of
record of Common Stock (or such other  capital  stock or  securities  receivable
upon the  conversion of this Note) shall be entitled to exchange their shares of
Common Stock (or such other stock  securities)  for securities or other property
deliverable  upon such event.  Any such  notice  shall be given at least 40 days
prior to the earliest date therein specified.

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         (g) This Note does not entitle the holder  hereof to any voting  rights
or  other  rights  as a  shareholder  of the  Maker,  nor to  any  other  rights
whatsoever except the rights herein set forth.

         9. Additional Covenants of the Maker.

         (a) The Maker shall comply with the reporting  requirements of Sections
13 and 15(d) of the Securities Exchange Act of 1934, as amended,  for so long as
and to the extent that such requirements apply to the Maker.

         (b) The Maker shall not, by amendment of its Articles of  Incorporation
or Bylaws or through  any  reorganization,  transfer  of assets,  consolidation,
merger, dissolution, issue or sale of securities, or any other voluntary action,
avoid or seek to avoid the observance or performance of any of the terms of this
Note.  Without  limiting the generality of the foregoing,  the Maker (i) will at
all times  reserve and keep  available,  solely for issuance  and delivery  upon
conversion of this Note,  shares of Common Stock issuable from time to time upon
conversion  of this Note,  (ii) will not increase the par value of any shares of
capital stock  receivable  upon conversion of this Note above the amount payable
therefor  upon such  conversion,  and (iii) will take all such actions as may be
necessary or  appropriate  in order that the Maker may validly and legally issue
fully paid and nonassessable stock upon conversion of this Note.

         (c) Until the entire  Principal  Amount of and all  accrued  but unpaid
interest  on this  Note is paid in full,  the  Maker  shall  not take any of the
following  actions without the prior written consent of the Payee (which consent
shall not be unreasonably withheld):

                  (i) sell all or a significant  portion of the Maker's  assets,
         or merge or enter into any  combination or  consolidation  with another
         person or entity, in which it is not the surviving entity or

                  (ii) directly or indirectly  make or pay any cash dividends or
         make any distributions on any of its equity securities.

         10.  Governing  Law.  This Note shall be governed by, and construed and
interpreted in accordance  with,  the laws of the State of Texas.  Venue for any
action arising out of this Note shall lie exclusively in Dallas County, Texas.

         11. Permitted Transfer or Assignment by Holder. The holder of this Note
may not  transfer  or assign to any person or entity all or any  portion of this
Note unless, prior to any transfer or assignment,  the holder of this Note gives
written notice to the Maker of such holder's proposal to effect such transfer or
assignment,  together with such information and other written  assurances as the
Maker may reasonably request with respect to the proposed transfer or assignment
and the proposed  transferee or assignee.  The Maker and the holder of this Note
acknowledge that the foregoing  condition is intended only to ensure  compliance
with  the  provisions  of the  Securities  Act of  1933,  as  amended,  and  any
applicable  state  securities  laws in respect of the transfer or  assignment of
this Note.

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         12.  Successors and Assigns.  This Note shall be binding upon the Maker
and its  successors,  and  shall  inure  to the  benefit  of the  Payee  and its
successors  and permitted  assigns.  The Maker shall not assign its  obligations
hereunder without the prior written consent of the Payee.

         13.  Notices.  Any  notice,  request,  demand  or  other  communication
permitted  or  required  to be given  pursuant to this Note shall be in writing,
shall be sent by one of the following  means to the addressee at the address set
forth below (or at such other address as shall be designated hereunder by notice
to the other parties receiving copies,  effective upon actual receipt) and shall
be  deemed  conclusively  to have been  given:  (a) on the  first  business  day
following the day timely  deposited  with Federal  Express (or other  equivalent
national  overnight  courier) or United States  Express  Mail,  with the cost of
delivery  prepaid;  (b) on the fifth business day following the day duly sent by
certified or registered  United States mail,  postage prepaid and return receipt
requested;  or (c) when  otherwise  actually  delivered to the  addressee.  If a
written notice or signed item is expressly required by another provision of this
Note, a manually  signed  original must be delivered by the party giving it. Any
other  notice,  request,  demand  or  other  communication  also  may be sent by
telegram  or  facsimile,  with the cost of  transmission  prepaid,  and shall be
deemed  inclusively to have been given on the day duly sent.  Copies may be sent
by regular  first-class mail,  postage prepaid,  to the parties set forth below,
but any failure or delay in sending  copies shall not affect the validity of any
such notice,  request,  demand or other  communication  so given to a party. The
addresses of the parties are as follows:

         (i)      If to the Maker:

                                MedSolutions, Inc.
                                12750 Merit Drive
                                Park Central VII, Suite 770
                                Dallas, Texas  75251
                                Attention:  Matthew H. Fleeger
                                Fax: (972) 931-2250

         (ii)     If to the Payee:

                                Don D. McAfee, M.D.
                               3149 Ellis Street, Suite 101
                               Bellingham, Washington
                               98225-1944

         14. Severability.  In case any provision of this Note shall be invalid,
illegal or  unenforceable,  the  validity,  legality and  enforceability  of the
remaining provisions shall not in any way be affected or impaired thereby.

         15.  Amendments  and  Waivers.  This Note may be amended  only with the
mutual  consent  of  the  Payee  and  the  Maker.  No  amendment  or  waiver  or
modification  of this Note shall be  effective  unless in writing  and signed by
both the Maker and the Payee.

                                       9
<PAGE>

         16. WAIVER OF JURY TRIAL. THE MAKER HEREBY  KNOWINGLY,  VOLUNTARILY AND
INTENTIONALLY  WAIVES (TO THE EXTENT  PERMITTED BY APPLICABLE  LAW) ANY RIGHT IT
MAY HAVE TO A TRIAL BY JURY OF ANY  DISPUTE  ARISING  UNDER OR  RELATING TO THIS
NOTE AND AGREES  THAT ANY SUCH  DISPUTE  SHALL,  AT THE OPTION OF THE PAYEE,  BE
TRIED BEFORE A JUDGE SITTING WITHOUT A JURY.

                                    MEDSOLUTIONS, INC.

                                 By: /s/ Matthew H. Fleeger
                                    --------------------------------------------
                                    Name:  Matthew H. Fleeger
                                    Title: President and Chief Executive Officer

                                       10<PAGE>
EXHIBIT 10.63

                      AMENDED AND RESTATED CREDIT AGREEMENT

         THIS AMENDED AND RESTATED CREDIT AGREEMENT is entered into as of
November ___, 2004, by and between AIRCOMP L.L.C., a Delaware limited liability
company ("BORROWER"), and WELLS FARGO BANK, NATIONAL ASSOCIATION ("BANK").

                                    RECITALS
                                    --------

         Borrower and the Bank entered into that certain Credit Agreement dated
as of June 27, 2003 (the "ORIGINAL AGREEMENT"), as amended by that certain First
Amendment to Credit Agreement dated as of December 31, 2003 (the "FIRST
AMENDMENT"), as amended by that certain Second Amendment to Credit Agreement
dated as of April 1, 2004 (the "SECOND AMENDMENT", together with the Original
Agreement and the First Amendment referred to hereinafter as the "PRIOR CREDIT
AGREEMENT").

         Borrower and the Bank desire to amend and restate in its entirety the
Prior Credit Agreement as set forth herein.

         Borrower agrees that the Prior Credit Agreement (including all Exhibits
and Schedules thereto) is hereby amended and restated, effective as of the date
hereof, to read in its entirety as set forth herein.

         NOW, THEREFORE, for valuable consideration, the receipt and sufficiency
of which are hereby acknowledged, Bank and Borrower hereby agree as follows:

                                   ARTICLE I
                                  CREDIT TERMS
                                  ------------

         SECTION 1.1. LINE OF CREDIT.

         (a) LINE OF CREDIT. Subject to the terms and conditions of this
Agreement, Bank hereby agrees to make advances to Borrower from time to time up
to and including June 27, 2007, not to exceed at any time the aggregate
principal amount of Three Million Five Hundred Thousand and No/00 Dollars
($3,500,000.00) ("LINE OF CREDIT"), the proceeds of which shall be used to (i)
provide working capital and for general corporate purposes of the Borrower, and
(ii) pay fees and expenses incurred in connection with the transactions
contemplated hereby. Borrower's obligation to repay advances under the Line of
Credit shall be evidenced by a promissory note substantially in the form of
EXHIBIT "A" attached hereto ("LINE OF CREDIT NOTE"), all terms of which are
incorporated herein by this reference.

         (b) LIMITATION ON BORROWINGS. The aggregate amount of all outstanding
borrowings under the Line of Credit, to a maximum of the principal amount set
forth above, shall not at any time exceed the lesser of (i) $3,500,000.00 minus
the aggregate face amount of all outstanding Letters of Credit or (ii) the
Borrowing Base minus the aggregate face amount of all outstanding Letters of
Credit. All borrowings under the Line of Credit shall be in an amount of at
least $10,000.00. There will be no minimum amount required on the borrowings
under the Line of Credit if borrowed through Bank's credit sweep products.

                                       4
<PAGE>

         (c) BASE BORROWINGS. Outstanding borrowings under the Line of Credit,
to a maximum of the principal amount set forth above, shall not at any time
exceed an aggregate of eighty percent (80%) of Borrower's Eligible Accounts
Receivable (the "BORROWING BASE"). All of the foregoing shall be determined by
Bank upon receipt and review of all collateral reports required hereunder and
such other documents and collateral information as Bank may from time to time
require. Borrower acknowledges that said Borrowing Base was established by Bank
with the understanding that, among other items, the aggregate of all returns,
rebates, discounts, credits and allowances for the immediately preceding three
(3) months at all times shall be less than five percent (5%) of Borrower's gross
sales for said period. If such dilution of Borrower's accounts for the
immediately preceding three (3) months at any time exceeds five percent (5%) of
Borrower's gross sales for said period, or if there at any time exists any other
matters, events, conditions or contingencies which Bank reasonably believes may
affect payment of any portion of Borrower's accounts, Bank, in its sole
discretion, may reduce the foregoing advance rate against Eligible Accounts
Receivable to a percentage appropriate to reflect such additional dilution
and/or establish additional reserves against Borrower's Eligible Accounts
Receivable.

         As used herein, "Eligible Accounts Receivable" shall consist solely of
trade accounts created in the ordinary course of Borrower's business, upon which
Borrower's right to receive payment is absolute and not contingent upon the
fulfillment of any condition whatsoever, and in which Bank has a perfected
security interest of first priority, and shall not include:

                  (i) any account which is more than sixty (60) days past due or
         ninety (90) days from the invoice date;

                  (ii) that portion of any account for which there exists any
         right of setoff, defense or discount (except regular discounts allowed
         in the ordinary course of business to promote prompt payment) or for
         which any defense or counterclaim has been asserted;

                  (iii) any account which represents an obligation of any state
         or municipal government or of the United States government or any
         political subdivision thereof (except accounts which represent
         obligations of the United States government and for which the
         assignment provisions of the Federal Assignment of Claims Act, as
         amended or recodified from time to time, have been complied with to
         Bank's satisfaction);

                  (iv) any account which represents an obligation of an account
         debtor located in a foreign country, except to the extent any such
         account, in Bank's determination, is supported by a letter of credit or
         insured under a policy of foreign credit insurance, in each case in
         form, substance and issued by a party acceptable to Bank;

                  (v) any account which arises from the sale or lease to or
         performance of services for, or represents an obligation of, an
         employee, affiliate, partner, member, parent or subsidiary of Borrower
         including, without limitation, Business Venture Owners;

                  (vi) that portion of any account, which represents interim or
         progress billings or retention rights on the part of the account
         debtor;

                                       5
<PAGE>

                  (vii) any account which represents an obligation of any
         account debtor when twenty percent (20%) or more of Borrower's accounts
         from such account debtor are not eligible pursuant to (i) above;

                  (viii) that portion of any account from an account debtor
         which represents the amount by which Borrower's total accounts from
         said account debtor exceeds twenty-five percent (25%) of Borrower's
         total accounts; provided, however, such percentage may be increased if
         (i) Bank, in Bank's sole discretion, approves of such increase and (ii)
         Borrower insures against such increase with insurance in amounts
         acceptable to Bank, in Bank's sole discretion;

                  (ix) accounts with credit balances which have aged more than
         ninety (90) days;

                  (x) any account in which services have not been rendered or
         goods have not been shipped; or

                  (xi) any account deemed ineligible by Bank when Bank, in its
         sole discretion, deems the creditworthiness or financial condition of
         the account debtor, or the industry in which the account debtor is
         engaged, to be unsatisfactory.

         (d) LETTER OF CREDIT SUBFEATURE. As a subfeature under the Line of
Credit, Bank agrees from time to time during the term thereof to issue or cause
an affiliate to issue standby letters of credit for the account of Borrower
(each, a "LETTER OF CREDIT" and collectively, "LETTERS OF CREDIT"); provided
however, that the aggregate undrawn amount of all outstanding Letters of Credit
shall not at any time exceed Two Hundred Thousand and No/00 Dollars
($200,000.00). The form and substance of each Letter of Credit shall be subject
to approval by Bank, in its sole discretion. Each Letter of Credit shall be
issued for a term not to exceed three hundred sixty-five (365) days, nor an
expiration date subsequent to the maturity date of the Line of Credit unless
such Letter of Credit is collateralized with liquid assets acceptable to Bank in
Bank's sole discretion. The undrawn amount of all Letters of Credit shall be
reserved under the Line of Credit and shall not be available for borrowings
thereunder. Each Letter of Credit shall be subject to the additional terms and
conditions of the Letter of Credit agreements, applications and any related
documents required by Bank in connection with the issuance thereof. Each drawing
paid under a Letter of Credit shall be deemed an advance under the Line of
Credit and shall be repaid by Borrower in accordance with the terms and
conditions of this Agreement applicable to such advances; provided however, that
if advances under the Line of Credit are not available, for any reason, at the
time any drawing is paid, then Borrower shall immediately pay to Bank the full
amount drawn, together with interest thereon from the date such drawing is paid
to the date such amount is fully repaid by Borrower, at the rate of interest
applicable to advances under the Line of Credit. In such event Borrower agrees
that Bank, in its sole discretion, may debit any account maintained by Borrower
with Bank for the amount of any such drawing. If Borrower does not pay to Bank
the sums due for such drawings, the unpaid amount thereof shall bear interest
equal to the Base Rate (as defined in the Line of Credit Note) plus three
percent (3%) for each day from and including the date such drawing was paid by
Bank to the date of repayment by Borrower.

                                       6
<PAGE>

         (e) BORROWING AND REPAYMENT. Borrower may from time to time during the
term of the Line of Credit borrow, partially or wholly repay its outstanding
borrowings, and reborrow, subject to all of the limitations, terms and
conditions contained herein or in the Line of Credit Note; provided however,
that the total outstanding borrowings under the Line of Credit shall not at any
time exceed the maximum principal amount available thereunder, as set forth
above. Borrower may prepay principal on the Line of Credit without penalty on
one (1) business day's advance notice. Prepayments on the Line of Credit shall
be in a principal amount of $10,000.00. There will be no minimum amount required
on prepayments of the Line of Credit paid through Bank's credit sweep product.
If at any time the outstanding aggregate unpaid principal amount of the Line of
Credit Note plus the sum of the issued and outstanding Letters of Credit exceeds
the Borrowing Base, the Borrower shall (i) immediately prepay the Line of Credit
loans in an aggregate principal amount equal to the excess, together with
interest on the principal amount paid accrued to the date of such prepayment and
(ii) if a Borrowing Base deficiency remains after prepaying all of the Line of
Credit loans because of the issued and outstanding Letters of Credit, the
Borrower shall pay to the Bank an amount equal to such Borrowing Base deficiency
to be held as cash collateral as provided in Section 1.1(f). The parties
understand and agree that all payments due and payable to the Bank under the
Line of Credit Note including all fees of Bank, will be auto-debited from
Borrower's checking account number 4945074375 held at Bank.

         (f) CASH COLLATERAL ACCOUNT. Borrower shall maintain with Bank, and
Borrower hereby grants to Bank a security interest in, a non-interest bearing
deposit account over which Borrower shall have no control ("CASH COLLATERAL
ACCOUNT") and into which, upon an Event of Default, the proceeds of all
Borrower's accounts and other rights to payment in which Bank has a security
interest shall be deposited immediately upon an Event of Default, and if
requested by Bank, the Borrower shall deposit in the Cash Collateral Account an
amount in cash equal to the aggregate undrawn amount of all outstanding Letters
of Credit. Bank shall, and Borrower hereby authorizes Bank to, apply all such
proceeds immediately upon their receipt by Bank to repayment of all obligations
of the Borrower relating to the aggregate amount of the undrawn Letters of
Credit. Borrower's Cash Collateral Account number held at Bank is 4945080273.

         SECTION 1.2. TERM LOAN.

         (a) TERM LOAN. Subject to the terms and conditions of this Agreement,
Bank hereby agrees to make a loan to Borrower in the principal amount of Seven
Million Sixty-One Thousand Sixty-Two and No/100 Dollars ($7,061,062.00) ("TERM
LOAN"), the proceeds of which shall be used to (i) provide working capital for
general corporate purposes of the Borrower, and (ii) pay fees and expenses
incurred in connection with the transactions contemplated hereby. Borrower's
obligation to repay the Term Loan shall be evidenced by a promissory note
substantially in the form of EXHIBIT "B" attached hereto ("TERM NOTE"), all
terms of which are incorporated herein by this reference. The initial advance of
the Term Loan shall not exceed the lesser of (i) sixty percent (60%) of the
orderly liquidation value or (ii) eighty percent (80%) of the forced liquidation
value of Borrower's equipment.

         (b) REPAYMENT. Principal and interest on the Term Loan shall be repaid
in accordance with the provisions of the Term Note.

                                       7
<PAGE>

         (c) PREPAYMENT. If the Term Loan bears interest at the Base Rate (as
defined in the Term Note), then Borrower may prepay the Term Loan without
penalty on one (1) business days' advance notice. Such prepayments of the Term
Loan shall be in the principal amount of $100,000.00. If the Term Loan bears
interest at LIBOR (as defined in the Term Note), then Borrower may prepay the
Term Loan without penalty (except as provided in the Term Note) on three (3)
business days' advance notice. All prepayments will include interest accrued to
the prepayment date and all other fees and expenses due. All prepayments will be
applied in the inverse order of payment due on the Term Loan.

         SECTION 1.3. DELAYED DRAW TERM LOAN.

         (a) DELAYED DRAW. Subject to the terms and conditions of this
Agreement, Bank hereby agrees to make advances to Borrower from time to time up
to and including December 27, 2005, not to exceed the aggregate principal amount
of One Million Five Hundred Thousand and No/100 Dollars ($1,500,000.00)
("DELAYED DRAW TERM LOAN"), the proceeds of which shall be used to finance the
purchase of capital equipment and planned upgrade of currently owned equipment,
and which shall be converted on December 27, 2005, to a term loan, as described
more fully below and in the Delayed Draw Term Note. Advances on the Delayed Draw
Term Loan are not to exceed one hundred percent (100%) of invoices on the
purchases of miscellaneous parts and labor. Borrower's obligation to repay
advances under the Delayed Draw Term Loan shall be evidenced by a promissory
note substantially in the form of EXHIBIT "C" attached hereto ("DELAYED DRAW
TERM NOTE"), all terms of which are incorporated herein by this reference.

         (b) LIMITATION ON BORROWINGS. Notwithstanding any of the other
provisions of this Agreement, the aggregate amount of all outstanding borrowings
under the Delayed Draw Term Loan shall not at any time exceed a maximum
principal amount of One Million Five Hundred Thousand and No/100 Dollars
($1,500,000.00). If the Delayed Draw Term Loan bears interest at the Base Rate
(as defined in the Delayed Draw Term Note), then borrowings under the Delayed
Draw Term Loan shall be in amounts of at least $10,000.00. If the Delayed Draw
Term Loan bears interest at LIBOR (as defined in the Delayed Draw Term Note),
then borrowings under the Delayed Draw Term Loan shall be in amounts in
multiples of at least $100,000.00.

         (c) BORROWING AND REPAYMENT. Borrower may from time to time during the
period in which Bank will make advances under the Delayed Draw Term Loan borrow
and partially or wholly repay (subject to prepayment provisions contained herein
and in the Delayed Draw Term Note) its outstanding borrowings, provided that
amounts repaid may not be reborrowed, subject to all the limitations, terms and
conditions contained herein; provided however, that the total outstanding
borrowings under the Delayed Draw Term Loan shall not at any time exceed the
maximum principal amount available thereunder, as set forth above. All unpaid
interest on the Delayed Draw Term Note as of December 31, 2005 shall be paid on
such date. Thereafter, principal and interest on the outstanding principal
balance of the Delayed Draw Term Note shall be due and payable in six (6)
installments of principal plus interest each, the first five (5) of which shall
be in a principal amount equal to five percent (5%) of the outstanding principal
balance on the Delayed Draw Term Note at the end of the business day on December
31, 2005, plus interest each, with the first such installment being due and
payable on March 31, 2006, and the sixth (6th) and final installment, if not
sooner paid, shall be due and payable on June 27, 2007, in an amount equal to
the entire balance of principal and accrued and unpaid interest then due and
owing on the Delayed Draw Term Note. Notwithstanding the foregoing, Borrower
shall make annual pre-payments on the thirty-first day of January of each year
of the outstanding principal balance of this Note equal to fifty percent (50%)
of Free Cash Flow (as such is defined in Section 5.7 hereof), commencing January
31, 2006 (calculated on the Free Cash Flow for the prior year ending on the

                                       8
<PAGE>

thirty-first day of each December commencing with December 31, 2005), and such
pre-payments shall be applied in inverse order of maturities, first to
prepayment of the Term Note, then to the Delayed Draw Term Note, and then to any
outstanding balance under the Line of Credit Note, as applicable.

         (d) PREPAYMENT. If the Delayed Draw Term Loan bears interest at the
Base Rate (as defined in the Delayed Draw Term Note), then Borrower may prepay
the Delayed Draw Term Loan without penalty on one (1) business day's advance
notice. Such prepayments of the Delayed Draw Term Loan will be at least
$100,000.00. If the Delayed Draw Term Loan bears interest at LIBOR (as defined
in the Delayed Draw Term Note), then Borrower may prepay the Delayed Draw Term
Loan without penalty (except as provided in the Delayed Draw Term Note) on three
(3) business days' notice. Such prepayments of the Delayed Draw Term Loan will
be at least $100,000.00. All prepayments will include interest accrued to the
prepayment date and all other fees and expenses due. All prepayments will be
applied in the inverse order of payments due on the Delayed Draw Term Loan.

         SECTION 1.3B WELLS FARGO COMMERCIAL MASTERCARD CUSTOMER AGREEMENT

         The Wells Fargo Bank, National Association hereby agrees to provide
credit to Borrower, not to exceed One Hundred Thousand and No/100 Dollars
$100,000.00, pursuant to the terms of the Wells Fargo Commercial MasterCard
Customer Agreement dated as of June 27, 2003 (the "WELLS FARGO COMMERCIAL
MASTERCARD AGREEMENT"), a copy of which is attached hereto as EXHIBIT "E."

         SECTION 1.4. INTEREST/FEES.

         (a) INTEREST. The outstanding principal balance of the Line of Credit
shall bear interest at a rate of interest set forth in the Line of Credit Note.
The outstanding principal balance from the Term Loan shall bear interest at the
rate of interest set forth in the Term Note. The outstanding principal balance
of the Delayed Draw Term Note shall bear interest at the rate of interest set
forth in the Delayed Draw Term Note.

         (b) COMPUTATION AND PAYMENT. Interest shall be computed on the basis of
a 360-day year, actual days elapsed, unless such calculation would result in a
usurious rate, in which case interest shall be computed on the basis of a
365/366-day year, as the case may be, actual days elapsed. Interest shall be
payable at the times and place set forth in each promissory note or other
instrument or document required hereby.

                                       9
<PAGE>

         (c) UNUSED COMMITMENT FEES. Borrower shall pay to Bank a fee equal to
three-eighths of one percent (.375%) per annum (computed on the basis of a
360-day year, actual days elapsed) on the average daily unused amount of the
Delayed Draw Term Note, which fee shall be calculated on a quarterly basis by
Bank and shall be due and payable by Borrower quarterly in arrears within ten
(10) days after each billing is sent by Bank and at December 31, 2004. The
Borrower shall pay to Bank a fee equal to one-half of one percent (.50%) per
annum (computed on the basis of the 360-day year, actual days elapsed) on the
average daily unused amount of the Line of Credit Note, which fee shall be
calculated on a quarterly basis by Bank and shall be due and payable by Borrower
quarterly in arrears within ten (10) days after each billing is sent by Bank and
at maturity of the Line of Credit Note.

         (d) UPFRONT FEES. Borrower shall pay to Bank an Upfront Fee equal to
the greater of (i) one-percent (1%) of the total increase in Bank's commitment
to make loans to the Borrower hereunder and (ii) Thirty-Four Thousand Nine
Hundred and No/100 Dollars ($34,900.00) on the date hereof. The parties hereto
agree and understand that the Upfront Fee described herein is non-refundable.

         (e) LETTER OF CREDIT FEES. Borrower shall pay to Bank (i) fees upon the
issuance of each Letter of Credit equal to the Base Rate margin (as defined in
the Line of Credit Note) at the time of issuance thereof multiplied by the face
amount thereof, subject to a minimum issuance fee of $750.00 per Letter of
Credit, each such fee being payable at issuance and on each anniversary date
thereafter and (ii) fees upon the payment or negotiation of each drawing under
any Letter of Credit and fees upon the occurrence of any other activity with
respect to any Letter of Credit (including without limitation, the transfer,
payment, negotiation, amendment or cancellation of any Letter of Credit)
determined in accordance with Bank's standard fees and charges then in effect
for such activity, including, without limitation, amendment fees of $175.00 per
amendment, and courier fees of $25.00 each.

         SECTION 1.5. COLLECTION OF PAYMENTS. Borrower authorizes Bank to
collect all principal, interest and fees due under each credit subject hereto by
charging Borrower's deposit account number 4945074375 with Bank or any other
deposit account maintained by Borrower with Bank, for the full amount thereof.
Should there be insufficient funds in any such deposit account to pay all such
sums when due, the full amount of such deficiency shall be immediately due and
payable by Borrower.

         SECTION 1.6. COLLATERAL.

         As security for all indebtedness of Borrower to Bank and its affiliates
subject hereto, Borrower hereby grants to Bank security interests of first
priority in all Borrower's assets in all Borrower's obligations hereunder and
all other Loan Documents executed herewith (collectively the "INDEBTEDNESS").
"Indebtedness" is used herein in its most comprehensive sense and includes any
and all advances, debts, obligations and liabilities of Borrower, heretofore,
now or hereafter made, incurred or created, whether voluntary or involuntary and
however arising, whether due or not due, absolute or contingent, including,
without limitation, all obligations of Borrower to Bank under commercial credit
card agreements (including, without limitation, the Wells Fargo Commercial
Master Card Customer Agreement ("CARD AGREEMENT"), letter of credit agreements
and applications, liquidated or unliquidated, determined or undetermined, and
whether Borrower may be liable individually or jointly with others, or whether
recovery upon such Indebtedness may be or hereafter becomes unenforceable,
including, without limitation, that certain (i) Renewed Term Note dated as of

                                       10
<PAGE>

even date herewith in the original principal amount of $7,061,062.00; (ii)
Renewed and Increased Delayed Draw Term Note as of even date herewith in the
original principal amount of $1,500,000.00; and (iii) Renewed and Increased
Revolving Line of Credit Note dated of even date herewith in the original
principal amount of $3,500,000.00; all executed by Borrower and payable to the
order of Bank; and all renewals, extensions, rearrangements, amendments,
modifications, and/or increases of any of the aforesaid. Borrower and Bank
acknowledge and agree that the above sentence does not give Borrower the right
to extend or increase its obligations to Bank beyond the ones created on even
date herewith without the written approval of M-I L.L.C., a Delaware limited
liability company ("MILLC"), Allis-Chalmers Corporation, a Delaware corporation
("A-C"), and Mountain Compressed Air, Inc., a Texas corporation ("MCA"). As
additional security for the Indebtedness of Borrower to Bank hereunder, Borrower
shall cause MCA and MILLC, to grant to Bank security interests of first priority
in all of MCA's and MILLC's respective outstanding limited liability company
interests of the Borrower. Borrower shall also cause MCA and MILLC (collectively
referred to herein as the "BUSINESS VENTURES OWNERS") to evidence any loans made
by the Business Venture Owners as of the date hereof, which constitute
inter-company debt, by requiring the parties to such loans to execute a
promissory note in form and substance satisfactory to Bank and to collaterally
assign to and deliver possession of such promissory notes to Bank. It is agreed
and understood that the grant to Bank of security interests in said promissory
notes shall be at all times a first priority security interest therein.

         All of the foregoing shall be evidenced by and subject to the terms of
such security agreements, financing statements, deeds of trust and other
documents as Bank shall reasonably require, all in form and substance
satisfactory to Bank. Borrower shall reimburse Bank immediately upon demand for
all costs and expenses incurred by Bank in connection with any of the foregoing
security, including without limitation, filing and recording fees and costs of
appraisals, audits and title insurance.

         SECTION 1.7. GUARANTIES. All indebtedness of Borrower to Bank hereunder
shall be guaranteed unconditionally, independently, by (i) MCA in an amount not
to exceed fifty-five percent (55%) of the Indebtedness at the time of demand
under the guaranty; (ii) MILLC in an amount not to exceed forty-five percent
(45%) of the Indebtedness at the time of demand under the guaranty, but in any
event not to exceed $3,900,000.00; and (iii) A-C, in an amount not to exceed
fifty-five percent (55%) of the Indebtedness at the time of demand under the
guaranty.

         SECTION 1.8. SUBORDINATION OF DEBT. All obligations of Borrower to the
Business Venture Owners shall be subordinated in right of repayment to all
obligations of Borrower to Bank, as evidenced by and subject to the terms of
subordination agreements in form and substance satisfactory to Bank.

                                   ARTICLE II
                         REPRESENTATIONS AND WARRANTIES
                         ------------------------------

         Borrower makes the following representations and warranties to Bank,
which representations and warranties shall survive the execution of this
Agreement and shall continue in full force and effect until the full and final
payment, and satisfaction and discharge, of all obligations of Borrower to Bank
subject to this Agreement.

                                       11
<PAGE>

         SECTION 2.1. LEGAL STATUS. Borrower is a limited liability company,
duly organized and existing and in good standing under the laws of the State of
Delaware, and is qualified or licensed to do business (and is in good standing
as a foreign corporation, if applicable) in all jurisdictions in which such
qualification or licensing is required or in which the failure to so qualify or
to be so licensed could have a material adverse effect on Borrower.

         SECTION 2.2. AUTHORIZATION AND VALIDITY. This Agreement and each
promissory note, contract, security agreement, pledge agreement, guaranty
agreement, the Wells Fargo Commercial MasterCard Commercial MasterCard
Agreement, instrument and other document required hereby or at any time
hereafter delivered to Bank in connection herewith (collectively, the "LOAN
DOCUMENTS") have been duly authorized, and upon their execution and delivery in
accordance with the provisions hereof will constitute legal, valid and binding
agreements and obligations of Borrower or the party which executes the same,
enforceable in accordance with their respective terms.

         SECTION 2.3. NO VIOLATION. The execution, delivery and performance by
Borrower of each of the Loan Documents do not violate any provision of any law
or regulation, or contravene any provision of the Business Venture Agreement of
Borrower, or result in any breach of or default under any contract, obligation,
indenture or other instrument to which Borrower is a party or by which Borrower
may be bound.

         SECTION 2.4. LITIGATION. There are no pending, or to the best of
Borrower's knowledge threatened, actions, claims, investigations, suits or
proceedings by or before any governmental authority, arbitrator, court or
administrative agency which could have a material adverse effect on the
financial condition or operation of Borrower other than those disclosed by
Borrower to Bank in writing prior to the date hereof.

         SECTION 2.5. CORRECTNESS OF FINANCIAL STATEMENT. The financial
statement of Borrower dated June 27, 2003, the audited financial statement of
Borrower dated as of December 31, 2003, and the unaudited financial statement
dated as of June 30, 2004, true copies of which have been delivered by Borrower
to Bank prior to the date hereof, (a) are complete and correct and present
fairly the financial condition of Borrower, (b) disclose all liabilities of
Borrower that are required to be reflected or reserved against under generally
accepted accounting principles, whether liquidated or unliquidated, fixed or
contingent, and (c) have been prepared in accordance with generally accepted
accounting principles consistently applied. Since the date of such financial
statements there has been no material adverse change in the financial condition
of Borrower, nor has Borrower mortgaged, pledged, granted a security interest in
or otherwise encumbered any of its assets or properties except in favor of Bank
or as otherwise permitted by Bank in writing.

         SECTION 2.6. INCOME TAX RETURNS. Borrower has no knowledge of any
pending assessments or adjustments of its income tax payable with respect to any
year.

         SECTION 2.7. NO SUBORDINATION. Other than that certain Subordination
Agreement dated as of June 27, 2003, between Borrower, Bank and the Business
Venture Owners (the "SUBORDINATION AGREEMENT"), there is no agreement,
indenture, contract or instrument to which Borrower is a party or by which
Borrower may be bound that requires the subordination in right of payment of any
of Borrower's obligations subject to this Agreement to any other obligation of
Borrower.

                                       12
<PAGE>

         SECTION 2.8. PERMITS, FRANCHISES. Borrower possesses, and will
hereafter possess, all permits, consents, approvals, franchises and licenses
required and rights to all trademarks, trade names, patents, and fictitious
names, if any, necessary to enable it to conduct the business in which it is now
engaged in compliance with applicable law.

         SECTION 2.9. ERISA. Borrower is in compliance in all material respects
with all applicable provisions of the Employee Retirement Income Security Act of
1974, as amended or recodified from time to time ("ERISA"); Borrower has not
violated any provision of any defined employee pension benefit plan (as defined
in ERISA) maintained or contributed to by Borrower (each, a "Plan"); no
Reportable Event as defined in ERISA has occurred and is continuing with respect
to any Plan initiated by Borrower; Borrower has met its minimum funding
requirements under ERISA with respect to each Plan; and each Plan will be able
to fulfill its benefit obligations as they come due in accordance with the Plan
documents and under generally accepted accounting principles.

         SECTION 2.10. OTHER OBLIGATIONS. Borrower is not in default on any
obligation for borrowed money, any purchase money obligation or any other
material lease, commitment, contract, instrument or obligation.

         SECTION 2.11. ENVIRONMENTAL MATTERS. Except as disclosed by Borrower to
Bank in writing prior to the date hereof, Borrower is in compliance in all
material respects with all applicable federal or state environmental, hazardous
waste, health and safety statutes, and any rules or regulations adopted pursuant
thereto, which govern or affect any of Borrower's operations and/or properties,
including without limitation, the Comprehensive Environmental Response,
Compensation and Liability Act of 1980, the Superfund Amendments and
Reauthorization Act of 1986, the Federal Resource Conservation and Recovery Act
of 1976, and the Federal Toxic Substances Control Act, as any of the same may be
amended, modified or supplemented from time to time. None of the operations of
Borrower is the subject of any federal or state investigation evaluating whether
any remedial action involving a material expenditure is needed to respond to a
release of any toxic or hazardous waste or substance into the environment.
Borrower has no material contingent liability in connection with any release of
any toxic or hazardous waste or substance into the environment.

         SECTION 2.12. REAL PROPERTY COLLATERAL. The Borrower has no real
property.

         SECTION 2.13. NO CONSENT. The Borrower's execution, delivery and
performance of each of the Loan Documents, including this Agreement, to which
the Borrower is a party do not require the consent or approval of any other
person or entity which have not been obtained including, without limitation, any
regulatory authority or governmental body of the United States of America or any
state thereof or any political subdivision of United States of America or any
state thereof.

                                       13
<PAGE>

         SECTION 2.14. QUALIFIED COMMERCIAL LOAN. This Loan is a Qualified
Commercial Loan as defined in Chapter 306 in the Texas Finance Code. This Loan
is not secured by real property and is not to be used for the purpose of
financing a business licensed by the Motor Vehicle Board of the Texas Department
of Transportation under Section 4.01(a), Texas Vehicle Commission (Article
4413(36), Vernon's Statute). Borrower has been advised by the Bank to seek the
advice of an attorney and an accountant in connection with this Qualified
Commercial Loan and Borrower has had the opportunity to seek the advice of an
attorney and an accountant of Borrower's choice in connection with this
Qualified Commercial Loan.

                                  ARTICLE III
                                   CONDITIONS
                                   ----------

         SECTION 3.1. CONDITIONS OF INITIAL EXTENSION OF CREDIT. The obligation
of Bank to extend any credit contemplated by this Agreement is subject to the
fulfillment to Bank's satisfaction of all of the following conditions:

         (a) APPROVAL OF BANK COUNSEL. All legal matters incidental to the
extension of credit by Bank shall be satisfactory to Bank's counsel.

         (b) DOCUMENTATION. Bank shall have received, in form and substance
satisfactory to Bank, each of the documents described on EXHIBIT "D" attached
hereto.

         (c) FINANCIAL CONDITION. There shall have been no material adverse
change, as determined by Bank on the assets, liabilities, financial condition,
business, operations or affairs of the Borrower or any guarantor, individually
or taken as a whole, different from those reflected in the latest financial
statements delivered to the Bank or from the facts represented or warranted in
any Loan Document, or (ii) the ability of the Borrower or any guarantor
hereunder to carry out its business as of the date hereof or as proposed as of
the date hereof to be conducted or meet their obligations under the Loan
Documents on a timely basis.

         (d) INSURANCE. Borrower shall have delivered to Bank evidence of
insurance coverage on all Borrower's property, in form, substance, amounts,
covering risks and issued by companies satisfactory to Bank, and where required
by Bank, with loss payable endorsements in favor of Bank, including without
limitation, policies of fire and extended coverage insurance covering all real
property collateral required hereby, with replacement cost and mortgagee loss
payable endorsements, and such policies of insurance against specific hazards
affecting any such real property as may be required by governmental regulation
or Bank; and all containing provisions that such policies cannot be canceled
without thirty (30) days' prior notice to Bank.

         (e) EQUITY CONTRIBUTION. Borrower shall have delivered to Bank evidence
satisfactory to Bank and Bank's counsel that the Business Venture Owners have
made a $4,600,000.00 equity contribution to the Borrower (the "REQUIRED EQUITY
CONTRIBUTION"), the proceeds of which shall be used to purchase the assets of
Diamond Air Drilling Services, Inc., a Texas corporation ("DIAMOND AIR"), and
the assets of Marquis Bit Co., LLC, a New Mexico limited liability company
("MARQUIS") described on Schedule 3.1(e) attached hereto.

                                       14
<PAGE>

         SECTION 3.2. CONDITIONS OF EACH BORROWING. The obligation of Bank to
make each extension of credit requested by Borrower hereunder shall be subject
to the fulfillment to Bank's satisfaction of each of the following conditions:

         (a) COMPLIANCE. The representations and warranties contained herein and
in each of the other Loan Documents shall be true on and as of the date of the
signing of this Agreement and on the date of each extension of credit by Bank
pursuant hereto, with the same effect as though such representations and
warranties had been made on and as of each such date, and on each such date, no
Event of Default as defined herein, and no condition, event or act which with
the giving of notice or the passage of time or both would constitute such an
Event of Default, shall have occurred and be continuing or shall exist.

         (b) DOCUMENTATION. Bank shall have received all additional documents
which may be required in connection with such extension of credit.

                                   ARTICLE IV
                              AFFIRMATIVE COVENANTS
                              ---------------------

         Borrower covenants that so long as Bank remains committed to extend
credit to Borrower pursuant hereto, or any liabilities (whether direct or
contingent, liquidated or unliquidated) of Borrower to Bank under any of the
Loan Documents remain outstanding, and until payment in full of all obligations
of Borrower subject hereto, Borrower shall, unless Bank otherwise consents in
writing:

         SECTION 4.1. PUNCTUAL PAYMENTS. Punctually pay all principal, interest,
fees or other liabilities due under any of the Loan Documents at the times and
place and in the manner specified therein, and immediately upon demand by Bank,
the amount by which the outstanding principal balance of any credit subject
hereto at any time exceeds any limitation on borrowings applicable thereto.

         SECTION 4.2. ACCOUNTING RECORDS. Maintain adequate books and records in
accordance with generally accepted accounting principles consistently applied,
and permit any representative of Bank, at any reasonable time and with two (2)
business days' notice, to inspect, audit and examine such books and records, to
make copies of the same, and to inspect the properties of Borrower.

         SECTION 4.3. FINANCIAL STATEMENTS. Provide to Bank all of the
following, in form and detail satisfactory to Bank:

         (a) not later than one hundred twenty (120) days after and as of the
end of each fiscal year, an audited financial statement of Borrower, on a
consolidated basis, prepared by a recognized independent accounting firm
acceptable to Bank, to include consolidated balance sheets and consolidated
statements of income, retained earnings and cash flow, in accordance with
generally accepted accounting principles, together with an unqualified opinion
and Borrower's covenant compliance calculations certified by the chief financial
officer;

                                       15
<PAGE>

         (b) Not later than one hundred twenty (120) days after and as of the
end of each fiscal year, an unaudited financial statement of A-C, on a
consolidated and consolidating basis to include MCA, prepared by A-C, to include
consolidated and consolidating balance sheets and consolidated and consolidating
statements of income, retained earnings, and cash flow, in accordance with
generally accepted accounting principles, certified by the chief financial
officer of A-C;

         (c) not later than one hundred twenty (120) days after and as of the
end of each fiscal year, an audited financial statement of A-C, on a
consolidated basis, prepared by a recognized independent accounting firm
acceptable to Bank, to include consolidated balance sheets and consolidated
statements of income, retained earnings and cash flow, in accordance with
generally accepted accounting principles, together with an unqualified opinion
and certified by the chief financial officer;

         (d) not later than one hundred and twenty days (120) days after and as
of the end of each fiscal year, audited consolidating financing statement of M-I
Group, ("M-I GROUP" is defined as MILLC, M-I Holdings B.V., M-I Drilling Fluids
Canada, Inc., M-I Holdings (BVI Ltd., and M-I Drilling Fluids de Mexico, S.A. de
C.V.), prepared by a recognized independent accounting firm acceptable to Bank,
to include consolidating balance sheets and consolidating statements of income,
retained earnings and cash flow, in accordance with generally accepted
accounting principles;

         (e) not later than one hundred and twenty days (120) days after and as
of the end of each fiscal year, unaudited consolidated financing statement of
MILLC, prepared by MILLC, to include consolidated balance sheets and
consolidated statements of income, retained earnings and cash flow, in
accordance with generally accepted accounting principles unaudited financing
statement for MILLC consolidated;

         (f) not later than forty-five (45) days after and as of the end of each
fiscal quarter, an unaudited financial statement of A-C, on a consolidated basis
(to include MCA), to include consolidated balance sheets and consolidated
statements of income, retained earnings and cash flow, in accordance with
generally accepted accounting principles, certified by the chief financial
officer of A-C;

         (g) no later than thirty (30) days after the end of each calendar
month, unaudited consolidated financial statements of Borrower, prepared by
Borrower, to include consolidated balance sheets and consolidated statements of
income, retained earnings and cash flow, in accordance with generally accepted
accounting principles;

         (h) no later than forty-five (45) days after the end of each calendar
quarter, collateral reports describing in reasonable detail the then location of
all collateral;

         (i) no later than sixty (60) days after and as of the end of each
fiscal year of Borrower prepared management reports to include forecasts of
Borrower's consolidated balance sheets and consolidated statements of income,
retained earnings and cash flow, in accordance with generally accepted
accounting principles;

         (j) not later than thirty (30) days after and as of the end of each
calendar month, a Borrowing Base certificate, attached hereto as SCHEDULE I,
listing ineligible accounts receivable, an aged listing of accounts receivable
and accounts payable, and a reconciliation of accounts, and not later than
thirty (30) days after and as of each calendar month, a list of the names and
addresses of all Borrower's account debtors;

                                       16
<PAGE>

         (k) contemporaneously with each annual and monthly financial statement
of Borrower required hereby, a certificate of the senior financial officer and
chief executive officer of Borrower that said financial statements are accurate
and that there exists no Event of Default nor any condition, act or event which
with the giving of notice or the passage of time or both would constitute an
Event of Default; and

         (l) from time to time such other information as Bank may reasonably
request.

         SECTION 4.4. COMPLIANCE. Preserve and maintain all licenses, permits,
governmental approvals, rights, privileges and franchises necessary for the
conduct of its business; and comply with the provisions of all documents
pursuant to which Borrower is organized and/or which govern Borrower's continued
existence and with the requirements of all laws, rules, regulations and orders
of any governmental authority applicable to Borrower and/or its business.

         SECTION 4.5. INSURANCE. Maintain and keep in force insurance of the
types and in amounts customarily carried in lines of business similar to that of
Borrower, including but not limited to fire, extended coverage, public
liability, flood, property damage and workers' compensation, with all such
insurance carried with companies and in amounts satisfactory to Bank, and
deliver to Bank from time to time at Bank's request Schedules setting forth all
insurance then in effect.

         SECTION 4.6. FACILITIES. Keep all properties useful or necessary to
Borrower's business in good repair and condition, and from time to time make
necessary repairs, renewals and replacements thereto so that such properties
shall be fully and efficiently preserved and maintained.

         SECTION 4.7. TAXES AND OTHER LIABILITIES. Pay and discharge when due
any and all indebtedness, obligations, assessments and taxes, both real or
personal, including without limitation federal and state income taxes and state
and local property taxes and assessments, except such (a) as Borrower may in
good faith contest or as to which a bona fide dispute may arise, and (b) for
which Borrower has made provision, to Bank's satisfaction, for eventual payment
thereof in the event Borrower is obligated to make such payment.

         SECTION 4.8. LITIGATION. Promptly give notice in writing to Bank of any
litigation pending or threatened against Borrower with a claim in excess of
$25,000.00 in the aggregate.

         SECTION 4.9. NOTICE TO BANK. Promptly (but in no event more than five
(5) days after the occurrence of each such event or matter) give written notice
to Bank in reasonable detail of: (a) the occurrence of any Event of Default, or
any condition, event or act which with the giving of notice or the passage of
time or both would constitute an Event of Default; (b) any change in the name or
the organizational structure of Borrower; (c) the occurrence and nature of any
Reportable Event or Prohibited Transaction, each as defined in ERISA, or any
funding deficiency with respect to any Plan; or (d) any termination or
cancellation of any insurance policy which Borrower is required to maintain, or
any uninsured or partially uninsured loss through liability or property damage,
or through fire, theft or any other cause affecting Borrower's property in
excess of an aggregate of $100,000.00.

                                       17
<PAGE>

         SECTION 4.10. DIAMOND AIR/MARQUIS DIVISION. From and after the date of
purchase of the assets of Diamond Air and Marquis through September 30, 2005,
all of such assets shall be run as a separate division of the Borrower and
separate profit and loss statements for the Diamond Air/Marquis Division will be
sent to Bank not later than thirty (30) days after the end of each calendar
month. In addition, the financial covenants contained in this Agreement shall
give effect to the aforesaid profit and loss statements and shall be referred to
herein as the "DIAMOND AIR/MARQUIS DIVISION."

                                   ARTICLE V
                               NEGATIVE COVENANTS
                               ------------------

         Borrower further covenants that so long as Bank remains committed to
extend credit to Borrower pursuant hereto, or any liabilities (whether direct or
contingent, liquidated or unliquidated) of Borrower to Bank under any of the
Loan Documents remain outstanding, and until payment in full of all obligations
of Borrower subject hereto, Borrower will not without Bank's prior written
consent:

         SECTION 5.1. USE OF FUNDS. Use any of the proceeds of any credit
extended hereunder except for the purposes stated in Article I hereof.

         SECTION 5.2. CAPITAL EXPENDITURES. Make any additional investment in
fixed assets in any fiscal year in excess of an aggregate of $1,500,000.00.

         SECTION 5.3. OTHER INDEBTEDNESS. Create, incur, assume or permit to
exist any indebtedness or liabilities resulting from borrowings, loans or
advances, whether secured or unsecured, matured or unmatured, liquidated or
unliquidated, joint or several, except (a) the liabilities of Borrower to Bank,
and (b) any other liabilities of Borrower existing as of, and disclosed to Bank
on SCHEDULE 5.3 attached hereto; provided, however, Borrower may incur
additional indebtedness to the extent that (i) the aggregate additional
indebtedness is less than $100,000.00 or (ii) the additional indebtedness is
unsecured, and (iii) the additional indebtedness is expressly subordinated to
Bank, (iv) the proposed terms and conditions of incurring such additional
indebtedness is satisfactory to Bank in Bank's sole discretion, and (v) Borrower
is able to demonstrate pro forma compliance with all covenants set forth herein.

         SECTION 5.4. MERGER, CONSOLIDATION, TRANSFER OF ASSETS. Merge into or
consolidate with any other entity; make any substantial change in the nature of
Borrower's business as conducted as of the date hereof; acquire all or
substantially all of the assets of any other entity; nor sell, lease, transfer
or otherwise dispose of all or a substantial or material portion of Borrower's
assets except in the ordinary course of its business.

         SECTION 5.5. GUARANTIES. Guarantee or become liable in any way as
surety, endorser (other than as endorser of negotiable instruments for deposit
or collection in the ordinary course of business), accommodation endorser or
otherwise for, nor pledge or hypothecate any assets of Borrower as security for,
any liabilities or obligations of any other person or entity, except any of the
foregoing in favor of Bank.

                                       18
<PAGE>

         SECTION 5.6. LOANS, ADVANCES, INVESTMENTS. Make any loans or advances
to or investments in any person or entity, except any of the foregoing existing
as of, and disclosed to Bank prior to, the date hereof.

         SECTION 5.7. DISTRIBUTIONS. Declare or pay any distributions to its
members or the Business Venture Owners either in cash or any other property, nor
redeem, retire, repurchase or otherwise acquire any membership interest in
Borrower; provided, however, the Borrower may distribute funds or repay inter
company loans so long as (a) Total Funded Debt to EBITDA is less than 1.5 to
1.0, (b) the Fixed Charge Coverage Ratio is greater than 2.0 to 1.0, after
having taken into effect such distribution, (c) such payments or distributions
do not exceed fifty percent (50%) of Free Cash Flow and (d) no Event of Default
has occurred nor would occur as a result of making such payments. Free Cash Flow
is defined as trailing twelve (12) months EBITDA less the sum of (i) interest
payments, (ii) scheduled quarterly principal repayments of the Term Loan and
Delayed Draw Loan, (iii) taxes, (iv) the Change in Adjusted Working Capital, and
(v) capital expenditures other than those financed under the Delayed Draw Term
Note for the same measurement period. Change in Adjusted Working Capital is
defined as the Adjusted Working Capital of the most recent reporting period and
less the adjusted working capital of the previous year end. Adjusted Working
capital is defined as (i) current assets (according to generally accepted
accounting principles) less (ii) cash and marketable securities less current
liabilities according to generally accepted accounting principles less (iii)
interest bearing debt or obligations that are classified as current liabilities.

         "TOTAL FUNDED DEBT TO EBITDA RATIO" is defined as Total Funded Debt
divided by twelve (12) trailing months EBITDA. "TOTAL FUNDED DEBT" is defined
herein as all interest bearing obligations of Borrower with a secured or
unsecured, senior or subordinated lender.

         SECTION 5.8. PLEDGE OF ASSETS. Mortgage, pledge, grant or permit to
exist a security interest in, or lien upon, all or any portion of Borrower's
assets now owned or hereafter acquired, except any of the foregoing in favor of
Bank or which is existing as of, and disclosed to Bank in writing prior to, the
date hereof.

         SECTION 5.9. LIMITATIONS ON LEASES. Create, incur, assume or permit to
exist any obligation for the payment of rent or hire or property of any kind
whatsoever under leases or lease agreements including, without limitation,
operating leases which will cause the aggregate amount of all payments made by
Borrower pursuant to all such leases or lease agreements to exceed $200,000.00
in any fiscal year.

         SECTION 5.10. TRANSACTIONS WITH AFFILIATES. Enter into any transaction,
including without limitation, any purchase, sale, lease or exchange of property
or the rendering of any service, with any affiliate of Borrower unless such
transactions are in the ordinary course of its business and are upon fair and
reasonable terms no less favorable to it than Borrower would obtain in a
comparable arm's length transaction with a person not an affiliate.

                                       19
<PAGE>

         SECTION 5.11. SALES AND LEASEBACKS. Except as contemplated by the
Business Venture Agreement dated as of June 27, 2003, between the Business
Venture Owners and A-C (the "BUSINESS VENTURE AGREEMENT"), enter into any
arrangement, directly or indirectly with any person whereby Borrower shall sale
or transfer any of its property, whether now or hereafter acquired, and whereby
Borrower shall then or thereafter make release as lessee such property or any
part thereof or other property which Borrower intends to use for substantially
the same purpose or purposes that the property is sold or transferred.

         SECTION 5.12. LIENS. Create, incur, assume or suffer to exist any lien
upon any of its assets or revenues whether now owned or hereafter acquired,
other than (a) liens pursuant to any Loan Document, (b) liens existing on the
date hereof and listed on SCHEDULE 5.12 and any renewals or extensions thereof,
PROVIDED that the property covered thereby is not increased in any renewal or
extension of the obligations secured or benefited thereby if permitted by
SECTION 5.3, (c) liens for taxes not yet due or which are being contested in
good faith and by appropriate proceedings diligently conducted, if adequate
reserves with respect thereto are maintained on the books of the applicable
person or entity in accordance with generally accepted accounting principles,
(d) carriers', warehouseman's, mechanics', materialman's, repairman's or other
like liens arising in the ordinary course of business in respect of obligations
which are not overdue for a period of more than six (6) days or which are being
contested in good faith and by appropriate proceedings diligently conducted, as
adequate reserves with respect thereto are maintained on the books of the
Borrower, (e) easements, rights-of-way, restrictions, landlord's liens and other
similar encumbrances affecting real property which, in the aggregate, are not
material in amounts and which do not in any case materially detract from the
value of the property subject thereto or materially interfere with the ordinary
conduct of the business of Borrower; (f) purchase money liens not to exceed
$100,000.00 in the aggregate; and (g) liens to secure the additional
indebtedness of Borrower permitted pursuant to Section 5.3 hereof in an amount
not to exceed $100,000.00 in the aggregate.

         SECTION 5.13. FINANCIAL CONDITION. Maintain Borrower's financial
condition as follows using generally accepted accounting principles consistently
applied and used consistently with prior practices (except to the extent
modified by the definitions herein.

         (a) Tangible Net Worth not at any time less than eighty-five percent
(85%) of Tangible Net Worth as of the opening balance sheet for Borrower on June
27, 2003, plus seventy-five percent (75%) of cumulative net income after the
date thereof, excluding any fiscal quarters in which net income is a negative,
plus one hundred percent (100%) of equity offerings after the date thereof, with
"Tangible Net Worth" defined herein as the aggregate of total members' equity
plus subordinated debt less any intangible assets; PROVIDED, HOWEVER, the
goodwill resulting from the acquisition of the assets of Diamond Air and
Marquis, not to exceed $1,800,000.00, will be excluded from the calculation.

         (b) Fixed Charge Coverage Ratio not less than 1.2 to 1.0 for the twelve
(12) month period ending on the last day of each fiscal quarter, beginning with
fiscal quarter ending December 31, 2004, with "EBITDA" defined herein as net
income plus cash interest charges, plus cash taxes, plus depreciation,
amortization and noncash charges on a trailing twelve (12) month basis and with
"FIXED CHARGE COVERAGE RATIO" defined herein as (i) EBITDA less capital

                                       20
<PAGE>

expenditures (other than those funded through the Delayed Draw Term Loan)
through the proceeds additional equity interests divided by (ii) the aggregate
of total interest charges (excluding any applicable PIK (hereinafter defined)
charges), scheduled principal payments, (including payments on inter-company
notes, loans or debt), equipment lease payments (operating or capital), cash
distributions paid, and cash taxes paid for the same period. Notwithstanding the
foregoing, through the September 30, 2005, compliance date, EBITDA related to
the business of the Diamond Air/Marquis Division and the expenses set forth
herein will be annualized from the [THE DATE HEREOF].

         (c) Effective September 30, 2004, Senior Funded Debt to EBITDA Ratio is
amended such that it is not more than 4.00 to 1.00 through and including
December 31, 2004; 3.25 to 1.00 through and including December 31, 2005; and 3.0
to 1.0 thereafter, with "SENIOR FUNDED DEBT TO EBITDA RATIO" defined as Senior
Funded Debt divided by twelve (12) trailing months EBITDA. "SENIOR FUNDED DEBT"
is defined herein as all interest bearing obligations of Borrower with a
secured, unsecured or senior lender or subordinated lender (unless the
subordinated lender has subordinated debt for which interest is paid in kind by
subordinated debt or issuance of equity for the entire relevant accounting
period (referred to herein as "PIK") or for which payment of interest is
suspended pursuant to this Agreement. Notwithstanding the foregoing through the
September 30, 2005 compliance date, EBITDA related to the business of the
Diamond Air/Marquis Division will be annualized to calculate the Senior Funded
Debt to EBITDA ratio. EBITDA shall be defined as in Section 5.13(b) above.

         SECTION 5.14. SUBORDINATED DEBT. Borrower shall not pay any principal
or interest on the subordinated debt described in the Subordination Agreement
except as expressly permitted therein.

                                   ARTICLE VI
                                EVENTS OF DEFAULT
                                -----------------

         SECTION 6.1. The occurrence of any of the following shall constitute an
"Event of Default" under this Agreement:

         (a) Borrower shall fail to pay when due any principal, interest, fees
or other amounts payable under any of the Loan Documents and such failure
continues for a period of ten (10) days after the earlier of (i) notice thereof
being given by the Bank to the Borrower and the guarantors or (ii) such default
otherwise becoming known to the Borrower or the guarantors.

         (b) Any financial statement or certificate furnished to Bank in
connection with, or any representation or warranty made by Borrower, any
guarantor, or any other party under this Agreement or any other Loan Document
shall prove to be incorrect, false or misleading in any material respect when
furnished or made.

         (c) Any default by Borrower or any guarantor in the performance of or
compliance with any obligation, agreement or other provision contained herein or
in any other Loan Document provided, however, that with respect to Sections 4.2,
4.3, 4.6 and 4.7 hereof, such default must continue unremedied for a period of
thirty (30) days after the earlier of (i) notice thereof being given by the Bank
to the Borrower and the guarantors or (ii) such default otherwise becoming known
to the Borrower or the guarantors.

                                       21
<PAGE>

         (d) Any default in the payment or performance of any obligation, or any
defined event of default, under the terms of any contract or instrument (other
than any of the Loan Documents) including, without limitation, the Wells Fargo
Commercial MasterCard Agreement pursuant to which Borrower or any guarantor
hereunder has incurred any debt or other liability to any person or entity,
including Bank and its affiliates; provided, however, with respect to MILLC, any
payment default in excess of $20,000,000.00 under the terms of any contract or
any instrument (other than any of the Loan Documents) pursuant to which MILLC
has incurred any debt or other liability to any person or entity, including
Bank, shall be an Event of Default hereunder.

         (e) The filing of a notice of judgment lien against Borrower or any
guarantor hereunder; or the recording of any abstract of judgment against
Borrower or any guarantor hereunder in any county in which Borrower or such
guarantor has an interest in real property; or the service of a notice of levy
and/or of a writ of attachment or execution, or other like process, against the
assets of Borrower or any guarantor hereunder; or the entry of a judgment
against Borrower or any guarantor hereunder. Notwithstanding the foregoing,
there shall be an Event of Default upon the filing of notices of judgment lien,
the recording of abstracts of judgment, or the entries of judgment against
Borrower or any guarantor hereunder if the aggregate amount of all such
judgments exceeds $50,000.00 and such judgments are not released within sixty
(60) days of the filing, recording or entry of such judgment.

         (f) Borrower or any guarantor hereunder shall become insolvent, or
shall suffer or consent to or apply for the appointment of a receiver, trustee,
custodian or liquidator of itself or any of its property, or shall generally
fail to pay its debts as they become due, or shall make a general assignment for
the benefit of creditors; Borrower or any guarantor hereunder shall file a
voluntary petition in bankruptcy, or seeking reorganization, in order to effect
a plan or other arrangement with creditors or any other relief under the
Bankruptcy Reform Act, Title 11 of the United States Code, as amended or
recodified from time to time ("BANKRUPTCY CODE"), or under any state or federal
law granting relief to debtors, whether now or hereafter in effect; or any
involuntary petition or proceeding pursuant to the Bankruptcy Code or any other
applicable state or federal law relating to bankruptcy, reorganization or other
relief for debtors is filed or commenced against Borrower or any guarantor
hereunder, or Borrower or any such guarantor shall file an answer admitting the
jurisdiction of the court and the material allegations of any involuntary
petition; or Borrower or any such guarantor shall be adjudicated a bankrupt, or
an order for relief shall be entered against Borrower or any such guarantor by
any court of competent jurisdiction under the Bankruptcy Code or any other
applicable state or federal law relating to bankruptcy, reorganization or other
relief for debtors.

         (g) There shall exist or occur any event or condition which Bank in
good faith believes impairs, or is substantially likely to impair, the prospect
of payment or performance by Borrower or any Guarantor of its obligations under
any of the Loan Documents.

         (h) The death or incapacity of any guarantor hereunder. The dissolution
or liquidation of Borrower or any guarantor hereunder; or Borrower or any such
guarantor, or any of their directors, stockholders or members, shall take action
seeking to effect the dissolution or liquidation of Borrower or such guarantor.

                                       22
<PAGE>

         (i) Any change in ownership of Borrower or MCA or a change in the
ownership of MILLC which would result in neither Smith International Inc., nor
Schlumberger, Ltd., owning fifty-one percent (51%) or more of MILLC during the
term of this Agreement.

         (j) The sale, transfer, hypothecation, assignment or encumbrance,
whether voluntary, involuntary or by operation of law, without Bank's prior
written consent, of all or any part of or interest in any real property
collateral required hereby.

         (k) An event which is a material adverse change (as such term is used
in Section 3.1(c) hereof) shall have occurred and is continuing.

         (l) The determination by any court that any provision of any Loan
Document is invalid.

         (m) (i) ERISA event occurs with respect to a pension plan or
multiemployer plan which has resulted or could reasonably be expected to result
in liability of the Borrower under Title IV of ERISA to the pension plan,
multiemployer plan or the PBGC in an aggregate amount in excess of $50,000.00,
or (ii) the Borrower or an ERISA affiliate fails to pay when due, after the
expiration of any applicable grace period, any installment payment with respect
to its withdrawal liability under Section 4201 of ERISA under a multiemployer
plan in an aggregate amount in excess of $100,000.00.

         (n) Borrower shall fail to deliver to Bank within sixty (60) days of
the date hereof any and all Agreements and Acknowledgments of Security
Interests, Waivers of Landlords or Mortgagees, and Assignment and Assumption
Agreements by such parties as Bank may require, and in form and substance
acceptable to Bank, in Bank's sole discretion.

         (o) Borrower shall fail to deliver to Bank within forty-five (45) days
of the date hereof security agreements and financing statements for all vehicles
owned by Borrower, MCA, or MILLC and all certificates of title (noting the
Bank's lien thereon and no other liens) covering all of said vehicles subject to
state certificate of title registration statutes or similar statutes.

         SECTION 6.2. REMEDIES. Upon the occurrence of any Event of Default: (a)
all principal and accrued and unpaid interest outstanding under each of the Loan
Documents, any term thereof to the contrary notwithstanding, shall at Bank's
option and without notice become immediately due and payable without
presentment, demand, or any notices of any kind, including without limitation
notice of nonperformance, notice of protest, protest, notice of dishonor, notice
of intention to accelerate or notice of acceleration, all of which are hereby
expressly waived by each Borrower; (b) the obligation, if any, of Bank to extend
any further credit under any of the Loan Documents shall immediately cease and
terminate; and (c) Bank shall have all rights, powers and remedies available
under each of the Loan Documents, or accorded by law, including without
limitation the right to resort to any or all security for any credit subject
hereto and to exercise any or all of the rights of a beneficiary or secured
party pursuant to applicable law. All rights, powers and remedies of Bank may be
exercised at any time by Bank and from time to time after the occurrence of an
Event of Default, are cumulative and not exclusive, and shall be in addition to
any other rights, powers or remedies provided by law or equity.

                                       23
<PAGE>

                                  ARTICLE VII
                                  MISCELLANEOUS
                                  -------------

         SECTION 7.1. NO WAIVER. No delay, failure or discontinuance of Bank in
exercising any right, power or remedy under any of the Loan Documents shall
affect or operate as a waiver of such right, power or remedy; nor shall any
single or partial exercise of any such right, power or remedy preclude, waive or
otherwise affect any other or further exercise thereof or the exercise of any
other right, power or remedy. Any waiver, permit, consent or approval of any
kind by Bank of any breach of or default under any of the Loan Documents must be
in writing and shall be effective only to the extent set forth in such writing.

         SECTION 7.2. NOTICES. All notices, requests and demands which any party
is required or may desire to give to any other party under any provision of this
Agreement must be in writing delivered to each party at the following address:

                  BORROWER:      AIRCOMP L.L.C.
                                 1034 Regional Park Drive
                                 Houston, Texas 77060

                  BANK:          WELLS FARGO BANK, NATIONAL ASSOCIATION
                                 1000 Louisiana, Third Floor
                                 Houston, Texas 77002

                  GUARANTORS:    M-I L.L.C.
                                 5950 North Course Drive
                                 Houston, Texas  77072

                                 MOUNTAIN COMPRESSED AIR, INC.
                                 5075 Westheimer, Suite 890
                                 Houston, Texas 77056

                                 ALLIS CHALMERS CORPORATION
                                 5075 Westheimer, Suite 890
                                 Houston, Texas  77056

or to such other address as any party may designate by written notice to all
other parties. Each such notice, request and demand shall be deemed given or
made as follows: (a) if sent by hand delivery, upon delivery; (b) if sent by
mail, upon the earlier of the date of receipt or three (3) days after deposit in
the U.S. mail, first class and postage prepaid; and (c) if sent by telecopy,
upon receipt.

         SECTION 7.3. COSTS, EXPENSES AND ATTORNEYS' FEES. Borrower shall pay to
Bank immediately upon demand the full amount of all payments, advances, charges,
costs and expenses, including reasonable attorneys' fees (to include outside
counsel fees and all allocated costs of Bank's in-house counsel to the extent
permissible), expended or incurred by Bank in connection with (a) the
negotiation and preparation of this Agreement and the other Loan Documents,
Bank's continued administration hereof and thereof, and the preparation of any
amendments and waivers hereto and thereto, (b) the enforcement of Bank's rights
and/or the collection of any amounts which become due to Bank under any of the

                                       24
<PAGE>

Loan Documents, (c) the prosecution or defense of any action in any way related
to any of the Loan Documents, including without limitation, any action for
declaratory relief, whether incurred at the trial or appellate level, in an
arbitration proceeding or otherwise, and including any of the foregoing incurred
in connection with any bankruptcy proceeding (including without limitation, any
adversary proceeding, contested matter or motion brought by Bank or any other
person) relating to any Borrower or any other person or entity, and (d) up to
two (2) and no more than four (4) collateral audits performed by Bank per fiscal
year with respect to the collateral or any other matter relating to the loans
provided for in this Agreement and/or Borrower's compliance with the terms and
the provisions of this Agreement; provided, however, Borrower's out-of-pocket
costs and expense under this subsection (d) is estimated at $850.00 per
eight-hour day per collateral audit.

         SECTION 7.4. SUCCESSORS, ASSIGNMENT. This Agreement shall be binding
upon and inure to the benefit of the heirs, executors, administrators, legal
representatives, successors and assigns of the parties; provided however, that
Borrower may not assign or transfer its interest hereunder without Bank's prior
written consent. Bank reserves the right to sell, assign, transfer, negotiate or
grant participations in all or any part of, or any interest in, Bank's rights
and benefits under each of the Loan Documents. In connection therewith, Bank may
disclose all documents and information which Bank now has or may hereafter
acquire relating to any credit subject hereto, Borrower or its business, any
guarantor hereunder or the business of such guarantor, or any collateral
required hereunder.

         SECTION 7.5. AMENDMENT. This Agreement may be amended or modified only
in writing signed by each party hereto.

         SECTION 7.6. NO THIRD PARTY BENEFICIARIES. This Agreement is made and
entered into for the sole protection and benefit of the parties hereto and their
respective permitted successors and assigns, and no other person or entity shall
be a third party beneficiary of, or have any direct or indirect cause of action
or claim in connection with, this Agreement or any other of the Loan Documents
to which it is not a party.

         SECTION 7.7. TIME. Time is of the essence of each and every provision
of this Agreement and each other of the Loan Documents.

         SECTION 7.8. SEVERABILITY OF PROVISIONS. If any provision of this
Agreement shall be prohibited by or invalid under applicable law, such provision
shall be ineffective only to the extent of such prohibition or invalidity
without invalidating the remainder of such provision or any remaining provisions
of this Agreement.

         SECTION 7.9. COUNTERPARTS. This Agreement may be executed in any number
of counterparts, each of which when executed and delivered shall be deemed to be
an original, and all of which when taken together shall constitute one and the
same Agreement.

         SECTION 7.10. GOVERNING LAW. This Agreement shall be governed by and
construed in accordance with the laws of the State of Texas.

                                       25
<PAGE>

         SECTION 7.11. SAVINGS CLAUSE. It is the intention of the parties to
comply strictly with applicable usury laws. Accordingly, notwithstanding any
provision to the contrary in the Loan Documents, in no event shall any Loan
Documents require the payment or permit the payment, taking, reserving,
receiving, collection or charging of any sums constituting interest under
applicable laws that exceed the maximum amount permitted by such laws, as the
same may be amended or modified from time to time (the "MAXIMUM RATE"). If any
such excess interest is called for, contracted for, charged, taken, reserved or
received in connection with any Loan Documents, or in any communication by Bank
or any other person to Borrower or any other person, or in the event that all or
part of the principal or interest hereof or thereof shall be prepaid or
accelerated, so that under any of such circumstances or under any other
circumstance whatsoever the amount of interest contracted for, charged, taken,
reserved or received on the amount of principal actually outstanding from time
to time under the Loan Documents shall exceed the Maximum Rate, then in such
event it is agreed that: (a) the provisions of this paragraph shall govern and
control; (b) neither Borrower nor any other person or entity now or hereafter
liable for the payment of any Loan Documents shall be obligated to pay the
amount of such interest to the extent it is in excess of the Maximum Rate; (c)
any such excess interest which is or has been received by Bank, notwithstanding
this paragraph, shall be credited against the then unpaid principal balance
hereof or thereof, or if any of the Loan Documents has been or would be paid in
full by such credit, refunded to Borrower; and (d) the provisions of each of the
Loan Documents, and any other communication to Borrower, shall immediately be
deemed reformed and such excess interest reduced, without the necessity of
executing any other document, to the Maximum Rate. The right to accelerate the
maturity of the Loan Documents does not include the right to accelerate, collect
or charge unearned interest, but only such interest that has otherwise accrued
as of the date of acceleration. Without limiting the foregoing, all calculations
of the rate of interest contracted for, charged, taken, reserved or received in
connection with any of the Loan Documents which are made for the purpose of
determining whether such rate exceeds the Maximum Rate shall be made to the
extent permitted by applicable laws by amortizing, prorating, allocating and
spreading during the period of the full term of such Loan Documents, including
all prior and subsequent renewals and extensions hereof or thereof, all interest
at any time contracted for, charged, taken, reserved or received by Bank. The
terms of this paragraph shall be deemed to be incorporated into each of the
other Loan Documents.

         To the extent that either Chapter 303 or 306, or both, of the Texas
Finance Code apply in determining the Maximum Rate, Bank hereby elects to
determine the applicable rate ceiling by using the weekly ceiling from time to
time in effect, subject to Bank's right subsequently to change such method in
accordance with applicable law, as the same may be amended or modified from time
to time.

         SECTION 7.12. RIGHT OF SETOFF; DEPOSIT ACCOUNTS. Upon and after the
occurrence of an Event of Default, (a) Borrower hereby authorizes Bank, at any
time and from time to time, without notice, which is hereby expressly waived by
each Borrower, and whether or not Bank shall have declared any credit subject
hereto to be due and payable in accordance with the terms hereof, to set off
against, and to appropriate and apply to the payment of, Borrower's obligations
and liabilities under the Loan Documents (whether matured or unmatured, fixed or
contingent, liquidated or unliquidated), any and all amounts owing by Bank to

                                       26
<PAGE>

Borrower (whether payable in U.S. dollars or any other currency, whether matured
or unmatured, and in the case of deposits, whether general or special (except
trust and escrow accounts), time or demand and however evidenced), and (b)
pending any such action, to the extent necessary, to hold such amounts as
collateral to secure such obligations and liabilities and to return as unpaid
for insufficient funds any and all checks and other items drawn against any
deposits so held as Bank, in its sole discretion, may elect. Borrower hereby
grants to Bank a security interest in all deposits and accounts maintained with
Bank and with any other financial institution to secure the payment of all
obligations and liabilities of Borrower to Bank under the Loan Documents.

         SECTION 7.13. BUSINESS PURPOSE. Borrower represents and warrants that
each credit subject hereto is for a business, commercial, investment,
agricultural or other similar purpose and not primarily for a personal, family
or household use.

         SECTION 7.14. ARBITRATION.

         (a) ARBITRATION. The parties hereto agree, upon demand by any party, to
submit to binding arbitration all claims, disputes and controversies between or
among them (and their respective employees, officers, directors, attorneys, and
other agents), whether in tort, contract or otherwise arising out of or relating
to in any way (i) the loan and related Loan Documents which are the subject of
this Agreement and its negotiation, execution, collateralization,
administration, repayment, modification, extension, substitution, formation,
inducement, enforcement, default or termination; or (ii) requests for additional
credit.

         (b) GOVERNING RULES. Any arbitration proceeding will (i) proceed in a
location in Texas selected by the American Arbitration Association ("AAA"); (ii)
be governed by the Federal Arbitration Act (Title 9 of the United States Code),
notwithstanding any conflicting choice of law provision in any of the documents
between the parties; and (iii) be conducted by the AAA, or such other
administrator as the parties shall mutually agree upon, in accordance with the
AAA's commercial dispute resolution procedures, unless the claim or counterclaim
is at least $1,000,000.00 exclusive of claimed interest, arbitration fees and
costs in which case the arbitration shall be conducted in accordance with the
AAA's optional procedures for large, complex commercial disputes (the commercial
dispute resolution procedures or the optional procedures for large, complex
commercial disputes to be referred to, as applicable, as the "Rules"). If there
is any inconsistency between the terms hereof and the Rules, the terms and
procedures set forth herein shall control. Any party who fails or refuses to
submit to arbitration following a demand by any other party shall bear all costs
and expenses incurred by such other party in compelling arbitration of any
dispute. Nothing contained herein shall be deemed to be a waiver by any party
that is a bank of the protections afforded to it under 12 U.S.C. ss.91 or any
similar applicable state law.

         (c) NO WAIVER OF PROVISIONAL REMEDIES, SELF-HELP AND FORECLOSURE. The
arbitration requirement does not limit the right of any party to (i) foreclose
against real or personal property collateral; (ii) exercise self-help remedies
relating to collateral or proceeds of collateral such as setoff or repossession;
or (iii) obtain provisional or ancillary remedies such as replevin, injunctive
relief, attachment or the appointment of a receiver, before during or after the
pendency of any arbitration proceeding. This exclusion does not constitute a
waiver of the right or obligation of any party to submit any dispute to
arbitration or reference hereunder, including those arising from the exercise of
the actions detailed in sections (i), (ii) and (iii) of this paragraph.

                                       27
<PAGE>

         (d) ARBITRATOR QUALIFICATIONS AND POWERS. Any arbitration proceeding in
which the amount in controversy is $5,000,000.00 or less will be decided by a
single arbitrator selected according to the Rules, and who shall not render an
award of greater than $5,000,000.00. Any dispute in which the amount in
controversy exceeds $5,000,000.00 shall be decided by majority vote of a panel
of three arbitrators; provided however, that all three arbitrators must actively
participate in all hearings and deliberations. The arbitrator will be a neutral
attorney licensed in the State of Texas with a minimum of ten years experience
in the substantive law applicable to the subject matter of the dispute to be
arbitrated. The arbitrator will determine whether or not an issue is
arbitratable and will give effect to the statutes of limitation in determining
any claim. In any arbitration proceeding the arbitrator will decide (by
documents only or with a hearing at the arbitrator's discretion) any pre-hearing
motions which are similar to motions to dismiss for failure to state a claim or
motions for summary adjudication. The arbitrator shall resolve all disputes in
accordance with the substantive law of Texas and may grant any remedy or relief
that a court of such state could order or grant within the scope hereof and such
ancillary relief as is necessary to make effective any award. The arbitrator
shall also have the power to award recovery of all costs and fees, to impose
sanctions and to take such other action as the arbitrator deems necessary to the
same extent a judge could pursuant to the Federal Rules of Civil Procedure, the
Texas Rules of Civil Procedure or other applicable law. Judgment upon the award
rendered by the arbitrator may be entered in any court having jurisdiction. The
institution and maintenance of an action for judicial relief or pursuit of a
provisional or ancillary remedy shall not constitute a waiver of the right of
any party, including the plaintiff, to submit the controversy or claim to
arbitration if any other party contests such action for judicial relief.

         (e) DISCOVERY. In any arbitration proceeding discovery will be
permitted in accordance with the Rules. All discovery shall be expressly limited
to matters directly relevant to the dispute being arbitrated and must be
completed no later than 20 days before the hearing date and within 180 days of
the filing of the dispute with the AAA. Any requests for an extension of the
discovery periods, or any discovery disputes, will be subject to final
determination by the arbitrator upon a showing that the request for discovery is
essential for the party's presentation and that no alternative means for
obtaining information is available.

         (f) CLASS PROCEEDINGS AND CONSOLIDATIONS. The resolution of any dispute
arising pursuant to the terms of this Agreement shall be determined by a
separate arbitration proceeding and such dispute shall not be consolidated with
other disputes or included in any class proceeding.

         (g) PAYMENT OF ARBITRATION COSTS AND FEES. The arbitrator shall award
all costs and expenses of the arbitration proceeding.

         (h) MISCELLANEOUS. To the maximum extent practicable, the AAA, the
arbitrators and the parties shall take all action required to conclude any
arbitration proceeding within 180 days of the filing of the dispute with the
AAA. No arbitrator or other party to an arbitration proceeding may disclose the
existence, content or results thereof, except for disclosures of information by
a party required in the ordinary course of its business or by applicable law or
regulation. If more than one agreement for arbitration by or between the parties
potentially applies to a dispute, the arbitration provision most directly
related to the Loan Documents or the subject matter of the dispute shall
control. This arbitration provision shall survive termination, amendment or
expiration of any of the Loan Documents or any relationship between the parties.

                                       28
<PAGE>

         SECTION 7.15. ASSIGNMENTS AND PARTICIPATIONS.

         (a) Borrower may not assign its rights or obligations hereunder or
under the Notes or any Letters of Credit without the prior consent of Bank.
Should Borrower attempt to assign its rights hereunder, Bank's obligations
hereunder will immediately cease and Bank shall be entitled to all commitment
fees, up-front fees, documentation fees, appraisal fees, audit fees, and due
diligence fees referred to herein.

         (b) Bank may, upon the written consent of Borrower and MILLC, which
consent shall not unreasonably be withheld, if no Event of Default has occurred
and is continuing, assign to one or more assignees all or a portion of its
rights and obligations under this Agreement. Neither Borrower's nor MILLC's
consent will be required if the assignment is to an affiliate of Bank or to any
lender other than lenders who are in the oil and gas business or competitors of
the Business Venture Owners or the Borrower. Any such assignment will become
effective upon the execution and delivery to Bank of an Assignment Agreement
(the "Assignment") and the consent of Borrower and Guarantor, if required.
Promptly after receipt of an executed Assignment, Bank shall send to Borrower a
copy of such executed Assignment. Upon receipt of such executed Assignment,
Borrower, will, at its own expense, execute and deliver new notes to the
assignor and/or assignee, as appropriate, in accordance with their respective
interests as they appear. Upon the effectiveness of any assignment pursuant to
this Section, the assignee will have all the rights and interests of Bank under
this Agreement and the other Loan Documents. The assignor shall be relieved of
its obligations hereunder to the extent of such assignment.

         (c) Bank may transfer, grant or assign participations in all or any
part of Bank's interests hereunder pursuant to this Section to any person,
PROVIDED that: (i) Bank shall remain "Bank" for all purposes of this Agreement;
and (ii) no participant under any such participation shall have rights to
approve any amendment to or waiver of any of the Loan Documents except to the
extent such amendment or waiver would (x) forgive any principal owing on any
obligations or extend the final maturity of the commitments or loans, (y) reduce
the interest rate (other than as a result of waiving the applicability of any
post-default increases in interest rates) or fees applicable to any of the
commitments or loans or Letters of Credit in which such participant is
participating, or postpone the payment of any thereof, or (z) release any
guarantor of the obligations or release all or substantially all of the
collateral (except as provided in the Loan Documents) supporting any of the
commitments or loans or Letters of Credit in which such participant is
participating. In the case of any such participation, the participant shall not
have any rights under this Agreement or any of the Loan Documents (the
participant's rights against Bank in respect of such participation to be those
set forth in the agreement with Bank creating such participation), and all
amounts payable by Borrower hereunder shall be determined as if Bank had not
sold such participation, PROVIDED that such participant shall be entitled to be
indemnified under Section 7.16 hereof.

         (d) Bank may furnish any information concerning Borrower in the
possession of Bank from time to time to assignees and participants (including
prospective assignees and participants).

                                       29
<PAGE>

         SECTION 7.16. INDEMNIFICATION. Borrower agrees:

         (a) to indemnify Bank, each assignee or participant hereunder, each of
their affiliates and each of their officers, directors, employees,
representatives, agents, attorneys, accountants and experts ("INDEMNIFIED
PARTIES") from, hold each of them harmless against and promptly upon demand pay
or reimburse each of them for, the Indemnity Matters (hereafter defined) which
may be incurred by or asserted against or involve any of them (whether or not
any of them is designated a party thereto) as a result of, arising out of or in
any way related to (i) any actual or proposed use by Borrower of the proceeds of
any of the Loans or Letters of Credit, (ii) the execution, delivery and
performance of the Loan Documents, (iii) the operations of the business of
Borrower, (iv) the failure of Borrower to comply with the terms of any Loan
Document or this Agreement, or with any applicable law, (v) any inaccuracy of
any representation or any breach of any warranty of Borrower or any Guarantor
set forth in any of the Loan Documents, (vi) the issuance, execution and
delivery or transfer of or payment or failure to pay under any Letter of Credit,
or (vii) the payment of a drawing under any Letter of Credit notwithstanding the
non-compliance, non-delivery or other improper presentation of the manually
executed draft(s) and certification(s), (viii) any assertion that any
Indemnified Party was not entitled to receive the proceeds received pursuant to
the Loan Documents or (ix) any other aspect of the Loan Documents, including,
without limitation, the reasonable fees and disbursements of counsel and all
other expenses incurred in connection with investigating, defending or preparing
to defend any such action, suit, proceeding (including any investigations,
litigation or inquiries) or claim and including all Indemnity Matters arising by
reason of the ordinary negligence of any Indemnified Party, but excluding all
Indemnity Matters arising solely by reason of claims between the Bank or any
assignee or participant, or any such party's shareholders against Bank or any
assignee or participant or by reason of the gross negligence or willful
misconduct on the part of the Indemnified Party. "Indemnity Matters" shall mean
any and all actions, suits, proceedings (including any investigations,
litigation or inquiries), claims, demands and causes of action made or
threatened against a person and, in connection therewith, all losses,
liabilities, damages (including, without limitation, consequential damages) or
reasonable costs and expenses of any kind or nature whatsoever incurred by such
person whether caused by the sole or concurrent negligence of such person
seeking indemnification.

         SECTION 7.17. WAIVER OF JURY TRIAL. TO THE FULLEST EXTENT PERMITTED BY
APPLICABLE LAW, BORROWER HEREBY IRREVOCABLY AND EXPRESSLY WAIVES ALL RIGHT TO A
TRIAL BY JURY IN ANY ACTION, PROCEEDING, OR COUNTERCLAIM (WHETHER BASED UPON
CONTRACT, TORT OR OTHERWISE) ARISING OUT OF OR RELATING TO THIS AGREEMENT OR ANY
OF THE LOAN DOCUMENTS OR THE TRANSACTIONS CONTEMPLATED THEREBY OR THE ACTIONS OF
BANK IN THE NEGOTIATION, ADMINISTRATION OR ENFORCEMENT THEREOF.

         SECTION 7.18. CONFIDENTIALITY. In the event that the Borrower or
Business Venture Owner, or any affiliate thereof, provides to the Bank
Information (as defined below). The Bank shall thereafter maintain such
information in confidence in accordance with the standards of care and diligence
that it utilizes in maintaining its own confidential information. For the
purposes of this Section, "INFORMATION" means all information (including

                                       30
<PAGE>

information from Borrower's books and records) received from the Borrower or any
affiliate thereof relating to the Borrower or any affiliate thereof or its
business, other than any such information that is available to the Bank on a
nonconfidential basis prior to disclosure by such person or entity. This
obligation of confidence shall not apply to such portions of the information
which (i) are in the public domain, (ii) hereafter become part of the public
domain without the Bank breaching its obligation of confidence to the Borrower
or any affiliate thereof, (iii) are previously known by the Bank from some
source other than the Borrower or any affiliate thereof, (iv) are hereafter
developed by the Bank without using the Information, (v) are hereafter obtained
by or available to the Bank from a third party who owes no obligation of
confidence to the Borrower with respect to such information or through any other
means other than through disclosure by the Borrower or any affiliate thereof,
(vi) are disclosed with the Borrower's consent, (vii) must be disclosed either
pursuant to any governmental requirement or to any person or entity regulating
the activities of the Bank, or (viii) as may be required by law or regulation or
order of any governmental authority in any judicial, arbitration or governmental
proceeding. Further, the Bank may disclose any such Information to consultants,
any independent certified public accountants, any legal counsel employed by such
person or entity in connection with this Agreement or any Loan Document,
including without limitation, the enforcement or exercise of all rights and
remedies thereunder, or any assignee or participant (including prospective
assignees and participants) in the loans evidenced by the Notes; PROVIDED,
HOWEVER, that the Bank shall receive a confidentiality agreement from the person
or entity to whom such Information is disclosed such that said person or entity
shall have the same obligation to maintain the confidentiality of such
information as is imposed upon the Bank hereunder. The Borrower waives any and
all other rights it may have to confidentiality as against the Bank arising by
contract, agreement, statute or law except as expressly stated in this Section.
Notwithstanding anything herein to the contrary, confidential information shall
not include, and the Bank (and each employee, representative or other agent of
the Bank) may disclose to any and all persons or entities, without limitation of
any kind, the "tax treatment" and "tax structure" (in each case, within the
meaning of Treasury Regulation Section 1.6011-4) of the transactions
contemplated hereby and all materials of any kind (including opinions or other
tax analyses) that are or have been provided to the Bank relating to such tax
treatment or tax structure; PROVIDED that with respect to any document or
similar item that in either case contains information concerning such tax
treatment or tax structure of the transactions contemplated hereby as well as
other information, this sentence shall only apply to such portions of the
document or similar item that relate to such tax treatment or tax structure.

         SECTION 7.19. PRIOR LIENS. This Agreement amends, supersedes, replaces,
restates and modifies the Prior Credit Agreement, but carries forward all liens
and security interests granted pursuant to the Prior Credit Agreement and the
instruments, documents and agreements executed and delivered pursuant to or in
connection with the Prior Credit Agreement.

NOTICE: THIS DOCUMENT AND ALL OTHER DOCUMENTS RELATING TO THE INDEBTEDNESS
CONSTITUTE A WRITTEN LOAN AGREEMENT WHICH REPRESENTS THE FINAL AGREEMENT BETWEEN
THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS OR
SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES. THERE ARE NO UNWRITTEN ORAL
AGREEMENTS BETWEEN THE PARTIES RELATING TO THE INDEBTEDNESS.

                                       31
<PAGE>

         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed as of the day and year first written above.

AIRCOMP L.L.C.                             WELLS FARGO BANK,
                                           NATIONAL ASSOCIATION

By: //s// Terry Keane                      By: //s// Alan Smith
    Terry Keane                                Alan Smith
    President                                  Vice President

                                       32
<PAGE>

                                   EXHIBIT "A"
                                   -----------

                           Form of Line of Credit Note

$3,500,000.00                                                     Houston, Texas
                                                              November ___, 2004

         FOR VALUE RECEIVED, the undersigned AIRCOMP L.L.C., a Delaware limited
liability company ("Borrower") promises to pay to the order of WELLS FARGO BANK,
NATIONAL ASSOCIATION ("Bank") at its office at 1000 Louisiana, Third Floor,
Houston, Texas, or at such other place as the holder hereof may designate, in
lawful money of the United States of America and in immediately available funds,
the principal sum of THREE MILLION FIVE HUNDRED THOUSAND AND NO/100 DOLLARS
($3,500,000.00), or so much thereof as may be advanced and be outstanding, with
interest thereon, to be computed on each advance from the date of its
disbursement as set forth herein.

INTEREST:

         (a) INTEREST. The Borrower agrees to pay interest at the Bank's address
listed above on the unpaid principal note hereof and, to the extent permitted by
law, the accrued interest in respect hereof from time to time from the date
hereof until payment in full of the principal amount hereof and accrued interest
hereon, at the rates and on the dates set forth on the Addendum attached hereto
and incorporated herein for all purposes.

         (b) PAYMENT OF INTEREST. Interest accrued on this Note shall be payable
on the last day of each March, June, September and December, commencing on
December 31, 2004.

         (c) DEFAULT INTEREST. From and after the maturity date of this Note, or
such earlier date as all principal owing hereunder becomes due and payable by
acceleration or otherwise, the outstanding principal balance of this Note shall
bear interest until paid in full at an increased rate per annum (computed on the
basis of a 360-day year, actual days elapsed, unless such calculation would
result in a usurious rate, in which case interest shall be computed on the basis
of a 365/366-day year, as the case may be, actual days elapsed) equal to four
percent (4%) above the rate of interest from time to time applicable to this
Note, but in no event at a rate greater than the Maximum Rate.

BORROWING AND REPAYMENT:

         (a) BORROWING AND REPAYMENT. Borrower may from time to time during the
term of this Note borrow, partially or wholly repay its outstanding borrowings,
and reborrow, subject to all of the limitations, terms and conditions of this
Note and of any document executed in connection with or governing this Note;
provided however, that the total outstanding borrowings under this Note shall
not at any time exceed the principal amount stated above. The unpaid principal
balance of this obligation at any time shall be the total amounts advanced
hereunder by the holder hereof less the amount of principal payments made hereon
by or for any Borrower, which balance may be endorsed hereon from time to time
by the holder. Borrower shall make annual pre-payments of the outstanding
principal balance of this Note equal to fifty percent (50%) of Free Cash Flow
(as such term is defined in Section 5.7 of the Credit Agreement), commencing
January 31, 2006, and such pre-payments shall be applied in inverse order of
maturities, first to prepayment of the Term Note (as defined in the Credit
Agreement) then to the Delayed Draw Term Note (as defined in the Credit
Agreement), and then to any outstanding balance under this Note, as applicable.
The outstanding principal balance of this Note shall be due and payable in full
on June 27, 2007.

                                  Exhibit "A"-1
<PAGE>

         (b) ADVANCES. Advances hereunder, to the total amount of the principal
sum stated above, may be made by the holder at the oral or written request of
the President or Controller of Borrower, any one acting alone, who are
authorized to request advances and direct the disposition of any advances until
written notice of the revocation of such authority is received by the holder at
the office designated above, or (ii) any person, with respect to advances
deposited to the credit of any deposit account of any Borrower, which advances,
when so deposited, shall be conclusively presumed to have been made to or for
the benefit of each Borrower regardless of the fact that persons other than
those authorized to request advances may have authority to draw against such
account. The holder shall have no obligation to determine whether any person
requesting an advance is or has been authorized by any Borrower.

         (c) APPLICATION OF PAYMENTS. Each payment made on this Note shall be
credited first, to any interest then due and second, to the outstanding
principal balance hereof.

EVENTS OF DEFAULT:

         This Note is made pursuant to and is subject to the terms and
conditions of that certain Amended and Restated Credit Agreement between
Borrower and Bank dated as of even date herewith (as amended from time to time
the "Credit Agreement"). Any default in the payment or performance of any
obligation under this Note, or any defined event of default under the Credit
Agreement, shall constitute an "Event of Default" under this Note.

MISCELLANEOUS:

         (a) REMEDIES. Upon the occurrence of any Event of Default, the holder
of this Note, at the holder's option, may declare all sums of principal and
accrued and unpaid interest outstanding hereunder to be immediately due and
payable without presentment, demand, or any notices of any kind, including
without limitation notice of nonperformance, notice of protest, protest, notice
of dishonor, notice of intention to accelerate or notice of acceleration, all of
which are expressly waived by each Borrower, and the obligation, if any, of the
holder to extend any further credit hereunder shall immediately cease and
terminate. Each Borrower shall pay to the holder immediately upon demand the
full amount of all payments, advances, charges, costs and expenses, including
reasonable attorneys' fees (to include outside counsel fees and all allocated
costs of the holder's in-house counsel to the extent permissible), expended or
incurred by the holder in connection with the enforcement of the holder's rights
and/or the collection of any amounts which become due to the holder under this
Note, and the prosecution or defense of any action in any way related to this
Note, including without limitation, any action for declaratory relief, whether
incurred at the trial or appellate level, in an arbitration proceeding or
otherwise, and including any of the foregoing incurred in connection with any
bankruptcy proceeding (including without limitation, any adversary proceeding,
contested matter or motion brought by Bank or any other person) relating to any
Borrower or any other person or entity.

                                  Exhibit "A"-2
<PAGE>

         (b) OBLIGATIONS JOINT AND SEVERAL. Should more than one person or
entity sign this Note as a Borrower, the obligations of each such Borrower shall
be joint and several.

         (c) GOVERNING LAW. THIS NOTE SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF TEXAS. THIS NOTE IS PERFORMABLE IN
HARRIS COUNTY, TEXAS. ANY ACTION OR PROCEEDING UNDER OR IN CONNECTION WITH THIS
NOTE AGAINST THE BORROWER OR ANY THIRD PARTY OBLIGOR MAY BE BROUGHT IN ANY STATE
OR FEDERAL COURT IN HARRIS COUNTY, TEXAS. BORROWER AND EACH THIRD PARTY OBLIGOR
HEREBY IRREVOCABLY (I) SUBMITS TO THE NON EXCLUSIVE JURISDICTION OF SUCH COURTS
AND (II) WAIVES ANY OBJECTION IT MAY NOW OR HEREAFTER HAVE AS TO THE VENUE OF
ANY SUCH ACTION OR PROCEEDING BROUGHT IN SUCH COURT OR THAT SUCH COURT IS IN
THESE IN INCONVENIENT FORM. NOTHING HEREIN SHALL AFFECT THE RIGHT OF THE BANK TO
BRING ANY ACTION OR PROCEEDING AGAINST THE BORROWER OR ANY THIRD PARTY OBLIGOR
OR WITH RESPECT TO ANY COLLATERAL IN ANY STATE OR FEDERAL COURT IN ANY OTHER
JURISDICTION. THE ACTION OR PROCEEDING BY THE BORROWER OR ANY THIRD PARTY
OBLIGOR AGAINST LENDER SHALL BE BROUGHT ONLY IN A COURT LOCATED IN HARRIS
COUNTY, TEXAS.

         (d) SAVINGS CLAUSE. It is the intention of the parties to comply
strictly with applicable usury laws. Accordingly, notwithstanding any provision
to the contrary in this Note, or in any contract, instrument or document
evidencing or securing the payment hereof or otherwise relating hereto (each, a
"Related Document"), in no event shall this Note or any Related Document require
the payment or permit the payment, taking, reserving, receiving, collection or
charging of any sums constituting interest under applicable laws that exceed the
maximum amount permitted by such laws, as the same may be amended or modified
from time to time (the "Maximum Rate"). If any such excess interest is called
for, contracted for, charged, taken, reserved or received in connection with
this Note or any Related Document, or in any communication by Bank or any other
person to Borrower or any other person, or in the event that all or part of the
principal or interest hereof or thereof shall be prepaid or accelerated, so that
under any of such circumstances or under any other circumstance whatsoever the
amount of interest contracted for, charged, taken, reserved or received on the
amount of principal actually outstanding from time to time under this Note shall
exceed the Maximum Rate, then in such event it is agreed that: (i) the
provisions of this paragraph shall govern and control; (ii) neither Borrower nor
any other person or entity now or hereafter liable for the payment of this Note
or any Related Document shall be obligated to pay the amount of such interest to
the extent it is in excess of the Maximum Rate; (iii) any such excess interest
which is or has been received by Bank, notwithstanding this paragraph, shall be
credited against the then unpaid principal balance hereof or thereof, or if this
Note or any Related Document has been or would be paid in full by such credit,
refunded to Borrower; and (iv) the provisions of this Note and each Related
Document, and any other communication to Borrower, shall immediately be deemed
reformed and such excess interest reduced, without the necessity of executing

                                  Exhibit "A"-3
<PAGE>

any other document, to the Maximum Rate. The right to accelerate the maturity of
this Note or any Related Document does not include the right to accelerate,
collect or charge unearned interest, but only such interest that has otherwise
accrued as of the date of acceleration. Without limiting the foregoing, all
calculations of the rate of interest contracted for, charged, taken, reserved or
received in connection with this Note and any Related Document which are made
for the purpose of determining whether such rate exceeds the Maximum Rate shall
be made to the extent permitted by applicable laws by amortizing, prorating,
allocating and spreading during the period of the full term of this Note or such
Related Document, including all prior and subsequent renewals and extensions
hereof or thereof, all interest at any time contracted for, charged, taken,
reserved or received by Bank. The terms of this paragraph shall be deemed to be
incorporated into each Related Document.

         To the extent that either Chapter 303 or 306, or both, of the Texas
Finance Code apply in determining the Maximum Rate, Bank hereby elects to
determine the applicable rate ceiling by using the weekly ceiling from time to
time in effect, subject to Bank's right subsequently to change such method in
accordance with applicable law, as the same may be amended or modified from time
to time.

         (e) RIGHT OF SETOFF; DEPOSIT ACCOUNTS. Upon and after the occurrence of
an Event of Default, (i) Borrower hereby authorizes Bank, at any time and from
time to time, without notice, which is hereby expressly waived by Borrower, and
whether or not Bank shall have declared this Note to be due and payable in
accordance with the terms hereof, to set off against, and to appropriate and
apply to the payment of, Borrower's obligations and liabilities under this Note
(whether matured or unmatured, fixed or contingent, liquidated or unliquidated),
any and all amounts owing by Bank to Borrower (whether payable in U.S. dollars
or any other currency, whether matured or unmatured, and in the case of
deposits, whether general or special (except trust and escrow accounts), time or
demand and however evidenced), and (ii) pending any such action, to the extent
necessary, to hold such amounts as collateral to secure such obligations and
liabilities and to return as unpaid for insufficient funds any and all checks
and other items drawn against any deposits so held as Bank, in its sole
discretion, may elect. Borrower hereby grants to Bank a security interest in all
deposits and accounts maintained with Bank and with any other financial
institution to secure the payment of all obligations and liabilities of Borrower
to Bank under this Note.

         (f) BUSINESS PURPOSE. Borrower represents and warrants that all loans
evidenced by this Note are for a business, commercial, investment, agricultural
or other similar purpose and not primarily for a personal, family or household
use.

         (g) CERTAIN TRI-PARTY ACCOUNTS. Borrower and Bank agree that Chapter
346 of the Texas Finance Code (which regulates certain revolving credit accounts
and revolving triparty accounts) shall not apply to any revolving loan accounts
created under this Note or maintained in connection herewith.

NOTICE: THIS NOTE AND ALL OTHER DOCUMENTS RELATING TO THE INDEBTEDNESS EVIDENCED
HEREBY CONSTITUTE A WRITTEN LOAN AGREEMENT WHICH REPRESENTS THE FINAL AGREEMENT
BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR,
CONTEMPORANEOUS OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES. THERE ARE NO
UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES RELATING TO THIS NOTE AND THE
INDEBTEDNESS EVIDENCED HEREBY.

                                  Exhibit "A"-4
<PAGE>

         This Note is in renewal and increase of, but not in novation or
discharge of, that certain Revolving Line of Credit Note dated as of June 27,
2003 in the principal amount of $1,000,000.00, executed by the Borrower and
payable to the order of the Bank.

         IN WITNESS WHEREOF, the undersigned has executed this Note as of the
date first written above.

                                             AIRCOMP L.L.C.

                                             By: /s/ Terry Keane
                                                 -------------------------------
                                                 Terry Keane
                                                 President

                                  Exhibit "A"-5
<PAGE>

                         ADDENDUM TO LINE OF CREDIT NOTE
                         (BASE RATE PRICING ADJUSTMENTS)

         THIS ADDENDUM is attached to and made a part of that certain renewed
and increased promissory note executed by AIRCOMP L.L.C., a Delaware limited
liability company ("Borrower") and payable to WELLS FARGO BANK, NATIONAL
ASSOCIATION ("Bank"), or order, dated as of November ___, 2004, in the principal
amount of Three Million Five Hundred Thousand and No/100 Dollars ($3,500,000.00)
(the "Note").

         The following provisions are hereby incorporated into the Note to
reflect the interest rate adjustments agreed to by Bank and Borrower:

INTEREST RATE ADJUSTMENTS:

         (a) DEFINITIONS. As used herein, the following terms shall have the
meanings set forth after each, and any other term defined herein:

         "Base Rate" shall mean the higher of (a) Prime Rate per annum in effect
         on that day, and (b) the Federal Fund Rate in effect on that day as
         announced by the Federal Reserve Bank of New York, plus 0.5% per annum.

         "Business Day" shall mean any day except a Saturday, Sunday, or any
         other day on which commercial banks in Texas are authorized or required
         to close by law.

         "Prime Rate" shall mean at any time the rate of interest most recently
         announced within the Bank at its principal office in San Francisco as
         its Prime Rate, with the understanding that the Bank's Prime Rate is
         one of its base rates and serves as the basis upon which effective
         rates of interest are calculated for those loans making reference
         thereto; and is evidenced by the recording thereof after its
         announcement in such internal publication or publications as the Bank
         may designate.

         (b) INITIAL INTEREST RATES. The initial interest rates applicable to
this Note shall be the rates set forth in the "Interest" paragraph herein.

         (c) INTEREST RATE ADJUSTMENTS. In addition to any interest rate
adjustments resulting from changes in the Prime Rate, Bank shall adjust the Base
Rate margin used to determine the rates of interest applicable to this Note on a
quarterly basis, commencing with the calendar quarter ending December 31, 2004,
if required to reflect a change in Borrower's ratio of Total Funded Debt to
EBITDA (as defined in the Credit Agreement referenced herein), in accordance
with the following grid:

                                  Exhibit "A"-6
<PAGE>

TOTAL FUNDED DEBT TO EBITDA                          APPLICABLE BASE RATE MARGIN
---------------------------                          ---------------------------
less than 2.0 to 1.0                                            1.50%
greater than or equal to 2.0 to 1.0 but less
   than 2.5 to 1.0                                              1.75%
greater than or equal to 2.5 to 1.0 but less
   than 3.0 to 1.0                                              2.00%
greater than or equal to 3.0 to 1.0                             2.25%

         Each such adjustment shall be effective on the first Business Day of
the calendar quarter following the quarter during which Bank receives and
reviews Borrower's most current calendar quarter-end financial statements in
accordance with any requirements established by Bank for the preparation and
delivery thereof.

         IN WITNESS WHEREOF, this Addendum has been executed as of the same date
as the Note.

                                             AIRCOMP L.L.C.

                                             By: /s/ Terry Keane
                                                 -------------------------------
                                                 Terry Keane
                                                 President

                                  Exhibit "A"-7
<PAGE>

                                   EXHIBIT "B"
                                   -----------

                                Form of Term Note

$7,061,062.00                                                     Houston, Texas
                                                              November ___, 2004

         FOR VALUE RECEIVED, the undersigned AIRCOMP L.L.C., a Delaware limited
liability company ("Borrower") promises to pay to the order of WELLS FARGO BANK,
NATIONAL ASSOCIATION ("Bank") at its office at 1000 Louisiana, Third Floor,
Houston, Texas, or at such other place as the holder hereof may designate, in
lawful money of the United States of America and in immediately available funds,
the principal sum of Seven Million Sixty-One Thousand Sixty-Two and No/100
Dollars ($7,061,062.00), with interest thereon as set forth herein.

DEFINITIONS:

         As used herein, the following terms shall have the meanings set forth
after each, and any other term defined in this Note shall have the meaning set
forth at the place defined:

         (a) "Base Rate" means the higher of (i) Prime Rate per annum in effect
on that day, and (ii) Federal Fund Rate in effect on that day as announced by
the Federal Reserve Bank of New York, plus 0.5% per annum.

         (b) "Business Day" means any day except a Saturday, Sunday or any other
day on which commercial banks in Texas are authorized or required by law to
close.

         (c) "Credit Agreement" means that certain Amended and Restated Credit
Agreement between Bank and Borrower of even date herewith, as same may be
further amended, restated, or otherwise modified.

         (d) "Fixed Rate Term" means a period commencing on a Business Day and
continuing for one, two, three or six months, as designated by Borrower, during
which all or a portion of the outstanding principal balance of this Note bears
interest determined in relation to LIBOR; provided however, that no Fixed Rate
Term may be selected for a principal amount less than One Hundred Thousand and
No/100 Dollars ($100,000.00); and provided further, that no Fixed Rate Term
shall extend beyond the scheduled maturity date hereof. If any Fixed Rate Term
would end on a day which is not a Business Day, then such Fixed Rate Term shall
be extended to the next succeeding Business Day.

         (e) "LIBOR" means the rate per annum (rounded upward, if necessary, to
the nearest whole 1/16 of 1%) and determined pursuant to the following formula:

                    LIBOR =           Base LIBOR
                            -------------------------------
                            100% - LIBOR Reserve Percentage

                                  Exhibit "B"-1
<PAGE>

                  (i) "Base LIBOR" means the rate per annum for United States
dollar deposits quoted by Bank as the Inter-Bank Market Offered Rate, with the
understanding that such rate is quoted by Bank for the purpose of calculating
effective rates of interest for loans making reference thereto, on the first day
of a Fixed Rate Term for delivery of funds on said date for a period of time
approximately equal to the number of days in such Fixed Rate Term and in an
amount approximately equal to the principal amount to which such Fixed Rate Term
applies. Borrower understands and agrees that Bank may base its quotation of the
Inter-Bank Market Offered Rate upon such offers or other market indicators of
the Inter-Bank Market as Bank in its discretion deems appropriate including, but
not limited to, the rate offered for U.S. dollar deposits on the London
Inter-Bank Market.

                  (ii) "LIBOR Reserve Percentage" means the reserve percentage
prescribed by the Board of Governors of the Federal Reserve System (or any
successor) for "Eurocurrency Liabilities" (as defined in Regulation D of the
Federal Reserve Board, as amended), adjusted by Bank for expected changes in
such reserve percentage during the applicable Fixed Rate Term.

         (f) "Prime Rate" means at any time the rate of interest most recently
announced within Bank at its principal office as its Prime Rate, with the
understanding that the Prime Rate is one of Bank's base rates and serves as the
basis upon which effective rates of interest are calculated for those loans
making reference thereto, and is evidenced by the recording thereof after its
announcement in such internal publication or publications as Bank may designate.

         (g) "Total Funded Debt" shall have the meaning ascribed to it in the
Credit Agreement.

INTEREST:

         (a) INTEREST. The Borrower agrees to pay interest at the Bank's address
listed above on the unpaid principal note hereof and, to the extent permitted by
law, the accrued interest in respect hereof from time to time from the date
hereof until payment in full of the principal amount hereof and accrued interest
hereon, at the rates and on the dates set forth on the Addendum attached hereto
and incorporated herein for all purposes.

         (b) SELECTION OF INTEREST RATE OPTIONS. At any time any portion of this
Note bears interest determined in relation to LIBOR, it may be continued by
Borrower at the end the Fixed Rate Term applicable thereto so that all or a
portion thereof bears interest determined in relation to the Base Rate or to
LIBOR for a new Fixed Rate Term designated by Borrower. At any time any portion
of this Note bears interest determined in relation to the Base Rate, Borrower
may convert all or a portion thereof so that it bears interest determined in
relation to LIBOR for a Fixed Rate Term designated by Borrower. At the time this
Note is disbursed or Borrower wishes to select a LIBOR option for all or a
portion of the outstanding principal balance hereof, and at the end of each
Fixed Rate Term, Borrower shall give Bank notice specifying: (i) the interest
rate option selected by Borrower; (ii) the principal amount subject thereto; and
(iii) for each LIBOR selection, the length of the applicable Fixed Rate Term.
Any such notice may be given by telephone (or such other electronic method as
Bank may permit) so long as, with respect to each LIBOR selection, (A) if
requested by Bank, Borrower provides to Bank written confirmation thereof not
later than three (3) Business Days after such notice is given, and (B) such

                                  Exhibit "B"-2
<PAGE>

notice is given to Bank prior to 10:00 a.m. on the first day of the Fixed Rate
Term, or at a later time during any Business Day if Bank, at it's sole option
but without obligation to do so, accepts Borrower's notice and quotes a fixed
rate to Borrower. If Borrower does not immediately accept a fixed rate when
quoted by Bank, the quoted rate shall expire and any subsequent LIBOR request
from Borrower shall be subject to a redetermination by Bank of the applicable
fixed rate. If no specific designation of interest is made at the time this Note
is disbursed or at the end of any Fixed Rate Term, Borrower shall be deemed to
have made a Base Rate interest selection for this Note or the principal amount
to which such Fixed Rate Term applied.

         (c) TAXES AND REGULATORY COSTS. Borrower shall pay to Bank immediately
upon demand, in addition to any other amounts due or to become due hereunder,
any and all (i) withholdings, interest equalization taxes, stamp taxes or other
taxes (except income and franchise taxes) imposed by any domestic or foreign
governmental authority and related in any manner to LIBOR, and (ii) future,
supplemental, emergency or other changes in the LIBOR Reserve Percentage,
assessment rates imposed by the Federal Deposit Insurance Corporation, or
similar requirements or costs imposed by any domestic or foreign governmental
authority or resulting from compliance by Bank with any request or directive
(whether or not having the force of law) from any central bank or other
governmental authority and related in any manner to LIBOR to the extent they are
not included in the calculation of LIBOR. In determining which of the foregoing
are attributable to any LIBOR option available to Borrower hereunder, any
reasonable allocation made by Bank among its operations shall be conclusive and
binding upon Borrower.

         (d) DEFAULT INTEREST. From and after the maturity date of this Note, or
such earlier date as all principal owing hereunder becomes due and payable by
acceleration or otherwise, the outstanding principal balance of this Note shall
bear interest until paid in full at an increased rate per annum (computed on the
basis of a 360-day year, actual days elapsed, unless such calculation would
result in a usurious rate, in which case interest shall be computed on the basis
of a 365/366-day year, as the case may be, actual days elapsed) equal to four
percent (4%) above the rate of interest from time to time applicable to this
Note, but in no event at a rate greater than the Maximum Rate.

BORROWINGS:

         (a) Borrower may from time to time from the date of this Note up to and
including June 27, 2007, borrow and partially or wholly repay its outstanding
borrowings, subject to all of the limitations, terms and conditions of this Note
and of any document executed in connection with or governing this Note; provided
however, that amounts repaid may not be reborrowed; and provided further, that
the total borrowings under this Note shall not exceed the principal amount
stated above. The unpaid principal balance of this obligation at any time shall
be the total amounts advanced hereunder by the holder hereof less the amount of
principal payments made hereon by or for any Borrower, which balance may be
endorsed hereon from time to time by the holder.

         (b) All Base Rate borrowings shall be in amounts of at least Ten
Thousand and No/100 Dollars ($10,000.00). All LIBOR borrowings shall be in
amounts of at least Five Hundred Thousand and No/100 Dollars ($500,000.00) and
in multiples of One Hundred Thousand and No/100 Dollars ($100,000.00)
thereafter.

                                  Exhibit "B"-3
<PAGE>

         (c) The amount and date of each Base Rate borrowing shall be designated
by an authorized representative of the Borrower requesting such borrowing in
form and substance satisfactory to Bank, at Bank's sole discretion, and such
borrowing request shall be received by the Bank at least one (1) Business Day
prior to the date of such loan, which date shall be a Business Day. Each Base
Rate loan shall be made at the office of the Bank and shall be funded prior to
2:00 p.m. Houston time, on the day so requested and immediately available fund
in the amount so requested.

         (d) The amount and date of each LIBOR borrowing shall be designated by
an authorized representative of the Borrower requesting such borrowing in form
and substance satisfactory to Bank, at Bank's sole discretion, and such
borrowing request shall be received by the Bank at least three (3) Business Days
prior to the date of such loan, which date shall be a Business Day. Each LIBOR
loan shall be made at the office of the Bank and shall be funded prior to 2:00
p.m. Houston time, on the day so requested and immediately available fund in the
amount so requested.

REPAYMENT AND PREPAYMENT:

         (a) REPAYMENT. Principal shall be payable on the last day of each
March, June, September and December in installments of Two Hundred Eighty Five
Thousand Seven Hundred Fourteen and 28/100 Dollars ($285,714.28) each,
commencing on December 31, 2004, and continuing up to and including March 31,
2007, with a final installment consisting of all remaining unpaid principal due
and payable in full on June 27, 2007. Notwithstanding the foregoing, Borrower
shall make annual pre-payments of the outstanding principal balance of this Note
equal to fifty percent (50%) of Free Cash Flow (as such term is defined in
Section 5.7 of the Credit Agreement), commencing January 31, 2006 (calculated on
the Free Cash Flow for the prior year ending on the thirty-first day of each
December commencing with December 31, 2005), and such pre-payments shall be
applied in inverse order of maturities, first to repayment of the Term Note (as
such term is defined in the Credit Agreement), then to the Delayed Draw Term
Loan (as defined in the Credit Agreement), and then to any outstanding balance
under the Line of Credit Note (as defined in the Credit Agreement), as
applicable.

         (b) APPLICATION OF PAYMENTS. Each payment made on this Note shall be
credited first, to any interest then due and second, to the outstanding
principal balance hereof. All payments credited to principal shall be applied
first, to the outstanding principal balance of this Note which bears interest
determined in relation to the Base Rate, if any, and second, to the outstanding
principal balance of this Note which bears interest determined in relation to
LIBOR, with such payments applied to the oldest Fixed Rate Term first.

         (c) PREPAYMENT.

         BASE RATE. Borrower may prepay this Note provided that all terms in the
Credit Agreement and herein are complied with (including the payment of any
prepayment penalties required in the Credit Agreement). As provided herein,
Borrower may prepay principal on any portion of this Note which bears interest
determined in relation to the Base Rate at any time and in the minimum amount of
One Hundred Thousand and No/100 Dollars ($100,000.00); provided however, if the
outstanding principal balance of such portion of this Note is less than said
amount, the minimum prepayment amount shall be the entire outstanding principal
hereof.

                                  Exhibit "B"-4
<PAGE>

         LIBOR. Borrower may prepay this Note provided that all terms in the
Credit Agreement and herein are complied with (including the payment of any
prepayment penalties required in the Credit Agreement). As provided herein,
Borrower may prepay principal on any portion of this Note which bears interest
determined in relation to LIBOR at any time and in the minimum amount of One
Hundred Thousand and No/100 Dollars ($100,000.00); provided, however, that if
the outstanding principal balance of such portion of this Note is less than said
amount, the minimum prepayment amount shall be the entire outstanding principal
balance thereof. In consideration of Bank providing this prepayment option to
Borrower, or if any such portion of this Note shall become due and payable at
any time prior to the last day of the Fixed Rate Term applicable thereto,
Borrower shall pay to Bank immediately upon demand a fee which is the sum of the
discounted monthly differences for each month from the month of prepayment
through the month in which such Fixed Rate Term matures, calculated as follows
for each such month:

                  (i) DETERMINE the amount of interest which would have accrued
each month on the amount prepaid at the interest rate applicable to such amount
had it remained outstanding until the last day of the Fixed Rate Term applicable
thereto.

                  (ii) SUBTRACT from the amount determined in (i) above the
amount of interest which would have accrued for the same month on the amount
prepaid for the remaining term of such Fixed Rate Term at LIBOR in effect on the
date of prepayment for new loans made for such term and in a principal amount
equal to the amount prepaid.

                  (iii) If the result obtained in (ii) for any month is greater
than zero, discount that difference by LIBOR used in (ii) above.

Each Borrower acknowledges that prepayment of such amount may result in Bank
incurring additional costs, expenses and/or liabilities, and that it is
difficult to ascertain the full extent of such costs, expenses and/or
liabilities. Each Borrower, therefore, agrees to pay the above-described
prepayment fee and agrees that said amount represents a reasonable estimate of
the prepayment costs, expenses and/or liabilities of Bank.

In addition, if Borrower makes an optional or required prepayment of a LIBOR
loan before the end of the related interest period, or fails to borrow, convert,
or extend a LIBOR loan after giving notice thereof, of if a LIBOR loan is
converted to Base Rate Loan as a result of certain changes and circumstances,
Borrower will reimburse Bank for any related funding losses and losses of
anticipated earnings.

All prepayments of principal on this Note, whether such prepayment is in
relation to a Base Rate option or a LIBOR option shall be applied first to
reduce the balloon payment due upon maturity hereof, if applicable, and second
to reduce the most remote of the principal installment or installments then
unpaid.

                                  Exhibit "B"-5
<PAGE>

EVENTS OF DEFAULT:

         This Note is made pursuant to and is subject to the terms and
conditions of that certain Amended and Restated Credit Agreement between
Borrower and Bank dated as of even date herewith (as amended from time to time
the "Credit Agreement"). Any default in the payment or performance of any
obligation under this Note, or any defined event of default under the Credit
Agreement, shall constitute an "Event of Default" under this Note.

MISCELLANEOUS:

         (a) REMEDIES. Upon the occurrence of any Event of Default, the holder
of this Note, at the holder's option, may declare all sums of principal and
accrued and unpaid interest outstanding hereunder to be immediately due and
payable without presentment, demand, or any notices of any kind, including
without limitation notice of nonperformance, notice of protest, protest, notice
of dishonor, notice of intention to accelerate or notice of acceleration, all of
which are expressly waived by each Borrower, and the obligation, if any, of the
holder to extend any further credit hereunder shall immediately cease and
terminate. Each Borrower shall pay to the holder immediately upon demand the
full amount of all payments, advances, charges, costs and expenses, including
reasonable attorneys' fees (to include outside counsel fees and all allocated
costs of the holder's in house counsel to the extent permissible), expended or
incurred by the holder in connection with the enforcement of the holder's rights
and/or the collection of any amounts which become due to the holder under this
Note, and the prosecution or defense of any action in any way related to this
Note, including without limitation, any action for declaratory relief, whether
incurred at the trial or appellate level, in an arbitration proceeding or
otherwise, and including any of the foregoing incurred in connection with any
bankruptcy proceeding (including without limitation, any adversary proceeding,
contested matter or motion brought by Bank or any other person) relating to any
Borrower or any other person or entity.

         (b) OBLIGATIONS JOINT AND SEVERAL. Should more than one person or
entity sign this Note as a Borrower, the obligations of each such Borrower shall
be joint and several.

         (c) GOVERNING LAW. THIS NOTE SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF TEXAS. THIS NOTE IS PERFORMABLE IN
HARRIS COUNTY, TEXAS. ANY ACTION OR PROCEEDING UNDER OR IN CONNECTION WITH THIS
NOTE AGAINST THE BORROWER OR ANY THIRD PARTY OBLIGOR MAY BE BROUGHT IN ANY STATE
OR FEDERAL COURT IN HARRIS COUNTY, TEXAS. BORROWER AND EACH THIRD PARTY OBLIGOR
HEREBY IRREVOCABLY (I) SUBMITS TO THE NON-EXCLUSIVE JURISDICTION OF SUCH COURTS,
AND (II) WAIVES ANY OBJECTION IT MAY NOW OR HEREAFTER HAVE AS TO THE VENUE OF
ANY SUCH ACTION OR PROCEEDING BROUGHT IN SUCH COURT OR THAT SUCH COURT IS AN
INCONVENIENT FORUM. NOTHING HEREIN SHALL AFFECT THE RIGHT OF THE BANK TO BRING
ANY ACTION OR PROCEEDING AGAINST THE BORROWER OR ANY THIRD PARTY OBLIGOR OR WITH
RESPECT TO ANY COLLATERAL IN ANY STATE OR FEDERAL COURT IN ANY OTHER
JURISDICTION. ANY ACTION OR PROCEEDING BY THE BORROWER OR ANY THIRD PARTY
OBLIGOR AGAINST LENDER SHALL BE BROUGHT ONLY IN A COURT LOCATED IN HARRIS
COUNTY, TEXAS.

                                  Exhibit "B"-6
<PAGE>

         (d) SAVINGS CLAUSE. It is the intention of the parties to comply
strictly with applicable usury laws. Accordingly, notwithstanding any provision
to the contrary in this Note, or in any contract, instrument or document
evidencing or securing the payment hereof or otherwise relating hereto (each, a
"Related Document"), in no event shall this Note or any Related Document require
the payment or permit the payment, taking, reserving, receiving, collection or
charging of any sums constituting interest under applicable laws that exceed the
maximum amount permitted by such laws, as the same may be amended or modified
from time to time (the "Maximum Rate"). If any such excess interest is called
for, contracted for, charged, taken, reserved or received in connection with
this Note or any Related Document, or in any communication by Bank or any other
person to Borrower or any other person, or in the event that all or part of the
principal or interest hereof or thereof shall be prepaid or accelerated, so that
under any of such circumstances or under any other circumstance whatsoever the
amount of interest contracted for, charged, taken, reserved or received on the
amount of principal actually outstanding from time to time under this Note shall
exceed the Maximum Rate, then in such event it is agreed that: (i) the
provisions of this paragraph shall govern and control; (ii) neither Borrower nor
any other person or entity now or hereafter liable for the payment of this Note
or any Related Document shall be obligated to pay the amount of such interest to
the extent it is in excess of the Maximum Rate; (iii) any such excess interest
which is or has been received by Bank, notwithstanding this paragraph, shall be
credited against the then unpaid principal balance hereof or thereof, or if this
Note or any Related Document has been or would be paid in full by such credit,
refunded to Borrower; and (iv) the provisions of this Note and each Related
Document, and any other communication to Borrower, shall immediately be deemed
reformed and such excess interest reduced, without the necessity of executing
any other document, to the Maximum Rate. The right to accelerate the maturity of
this Note or any Related Document does not include the right to accelerate,
collect or charge unearned interest, but only such interest that has otherwise
accrued as of the date of acceleration. Without limiting the foregoing, all
calculations of the rate of interest contracted for, charged, taken, reserved or
received in connection with this Note and any Related Document which are made
for the purpose of determining whether such rate exceeds the Maximum Rate shall
be made to the extent permitted by applicable laws by amortizing, prorating,
allocating and spreading during the period of the full term of this Note or such
Related Document, including all prior and subsequent renewals and extensions
hereof or thereof, all interest at any time contracted for, charged, taken,
reserved or received by Bank. The terms of this paragraph shall be deemed to be
incorporated into each Related Document.

         To the extent that either Chapter 303 or 306, or both, of the Texas
Finance Code apply in determining the Maximum Rate, Bank hereby elects to
determine the applicable rate ceiling by using the weekly ceiling from time to
time in effect, subject to Bank's right subsequently to change such method in
accordance with applicable law, as the same may be amended or modified from time
to time.

         (e) RIGHT OF SETOFF; DEPOSIT ACCOUNTS. Upon and after the occurrence of
an Event of Default, (i) Borrower hereby authorizes Bank, at any time and from
time to time, without notice, which is hereby expressly waived by Borrower, and
whether or not Bank shall have declared this Note to be due and payable in
accordance with the terms hereof, to set off against, and to appropriate and
apply to the payment of, Borrower's obligations and liabilities under this Note
(whether matured or unmatured, fixed or contingent, liquidated or unliquidated),
any and all amounts owing by Bank to Borrower (whether payable in U.S. dollars

                                  Exhibit "B"-7
<PAGE>

or any other currency, whether matured or unmatured, and in the case of
deposits, whether general or special (except trust and escrow accounts), time or
demand and however evidenced), and (ii) pending any such action, to the extent
necessary, to hold such amounts as collateral to secure such obligations and
liabilities and to return as unpaid for insufficient funds any and all checks
and other items drawn against any deposits so held as Bank, in its sole
discretion, may elect. Borrower hereby grants to Bank a security interest in all
deposits and accounts maintained with Bank and with any other financial
institution to secure the payment of all obligations and liabilities of Borrower
to Bank under this Note.

         (f) BUSINESS PURPOSE. Borrower represents and warrants that all loans
evidenced by this Note are for a business, commercial, investment, agricultural
or other similar purpose and not primarily for a personal, family or household
use.

NOTICE: THIS NOTE AND ALL OTHER DOCUMENTS RELATING TO THE INDEBTEDNESS EVIDENCED
HEREBY CONSTITUTE A WRITTEN LOAN AGREEMENT WHICH REPRESENTS THE FINAL AGREEMENT
BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR,
CONTEMPORANEOUS OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES. THERE ARE NO
UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES RELATING TO THIS NOTE AND THE
INDEBTEDNESS EVIDENCED HEREBY.

         This Note is in renewal of, but not in novation or discharge of that
certain Term Note dated as of June 27, 2003 in the principal amount of
$8,000,000.00, executed by the Borrower and payable to the order of the Bank.

         IN WITNESS WHEREOF, the undersigned has executed this Note as of the
date first written above.

                                             AIRCOMP L.L.C.

                                             By: /s/ Terry Keane
                                                 -------------------------------
                                                 Terry Keane
                                                 President

                                  Exhibit "B"-8
<PAGE>

                              ADDENDUM TO TERM NOTE
                      (BASE RATE/LIBOR PRICING ADJUSTMENTS)

         THIS ADDENDUM is attached to and made a part of that certain promissory
note executed by AIRCOMP L.L.C., a Delaware limited liability company
("Borrower") and payable to WELLS FARGO BANK, NATIONAL ASSOCIATION ("Bank"), or
order, dated as of even date herewith, in the principal amount of Seven Million
Sixty-One Thousand Sixty-Two and No/100 Dollars ($7,061,062.00) (the "Note").

         The following provisions are hereby incorporated into the Note to
reflect the interest rate adjustments agreed to by Bank and Borrower:

INTEREST RATE ADJUSTMENTS:

         (a) INITIAL INTEREST RATES. The initial interest rates applicable to
this Note shall be the rates set forth in the "Interest" paragraph herein.

         (b) INTEREST RATE ADJUSTMENTS. In addition to any interest rate
adjustments resulting from changes in the Base Rate, Bank shall adjust the Base
Rate and LIBOR margins used to determine the rates of interest applicable to
this Note on a quarterly basis, commencing with the calendar quarter ending
December 31, 2004, if required to reflect a change in Borrower's ratio of Total
Funded Debt to EBITDA (as defined in the Credit Agreement referenced herein), in
accordance with the following grid:

                                              APPLICABLE             APPLICABLE
TOTAL FUNDED DEBT TO EBITDA                BASE RATE MARGIN         LIBOR MARGIN
---------------------------                ----------------         ------------
Less than 2.0 to 1.0                            .25%                   2.00%

greater than or equal to 2.0 to 1.0 but
less than 2.5 to 1.0                            .50%                   2.25%

greater than or equal to 2.5 to 1.0 but
less than 3.0 to 1.0                            .75%                   2.50%

greater than or equal to 3.0 to 1.0             1.0%                   2.75%

Each such adjustment shall be effective on the first Business Day of the
calendar quarter following the quarter during which Bank receives and reviews
Borrower's most current calendar quarter-end financial statements in accordance
with any requirements established by Bank for the preparation and delivery
thereof.

         (c) With respect to LIBOR loans, each interest payment shall be payable
on the last day of each Fixed Rate Term (as defined in the Credit Agreement)
elected by the Borrower and upon maturity of the Note; provided, however, in the
event Borrower elects a six-month Fixed Rate Term, then such installments of
interest shall be due and payable on the last day of the third month of such
Fixed Rate Term.

                                  Exhibit "B"-9
<PAGE>

         (d) With respect to Base Rate loans, each interest payment shall be
payable on the last day of each March, June, September and December commencing
on December 31, 2004, through and including maturity of this Note.

         IN WITNESS WHEREOF, this Addendum has been executed as of the same date
as the Note.

                                             AIRCOMP L.L.C.

                                             By: /s/ Terry Keane
                                                 -------------------------------
                                                 Terry Keane
                                                 President

                                  Exhibit "B"-10
<PAGE>

                                   EXHIBIT "C"
                                   -----------

                         Form of Delayed Draw Term Note

$1,500,000.00                                                     Houston, Texas
                                                              November ___, 2004

         FOR VALUE RECEIVED, the undersigned AIRCOMP L.L.C., a Delaware limited
liability company ("Borrower") promises to pay to the order of WELLS FARGO BANK,
NATIONAL ASSOCIATION ("Bank") at its office at 1000 Louisiana, Third Floor,
Houston, Texas, or at such other place as the holder hereof may designate, in
lawful money of the United States of America and in immediately available funds,
the principal sum of One Million Five Hundred Thousand and No/100 Dollars
($1,500,000.00), with interest thereon as set forth herein.

DEFINITIONS:

         As used herein, the following terms shall have the meanings set forth
after each, and any other term defined in this Note shall have the meaning set
forth at the place defined:

         (a) "Base Rate" shall mean the higher of (a) Prime Rate per annum in
effect on that day, and (b) the Federal Fund Rate in effect on that day as
announced by the Federal Reserve Bank of New York, plus 0.5% per annum.

         (b) "Business Day" means any day except a Saturday, Sunday or any other
day on which commercial banks in Texas are authorized or required by law to
close.

         (c) "Credit Agreement" means that certain Amended and Restated Credit
Agreement between Bank and Borrower of even date herewith, as same may be
amended, restated or otherwise modified.

         (d) "Fixed Rate Term" means a period commencing on a Business Day and
continuing for one, two, three or six months, as designated by Borrower, during
which all or a portion of the outstanding principal balance of this Note bears
interest determined in relation to LIBOR; provided however, that no Fixed Rate
Term may be selected for a principal amount less than One Hundred Thousand And
No/100 Dollars ($100,000.00); and provided further, that no Fixed Rate Term
shall extend beyond the scheduled maturity date hereof. If any Fixed Rate Term
would end on a day which is not a Business Day, then such Fixed Rate Term shall
be extended to the next succeeding Business Day.

         (e) "LIBOR" means the rate per annum (rounded upward, if necessary, to
the nearest whole 1/16 of 1%) and determined pursuant to the following formula:

                LIBOR =           Base LIBOR
                        -------------------------------
                        100% - LIBOR Reserve Percentage

                                  Exhibit "C"-1
<PAGE>

                  (i) "Base LIBOR" means the rate per annum for United States
dollar deposits quoted by Bank as the Inter-Bank Market Offered Rate, with the
understanding that such rate is quoted by Bank for the purpose of calculating
effective rates of interest for loans making reference thereto, on the first day
of a Fixed Rate Term for delivery of funds on said date for a period of time
approximately equal to the number of days in such Fixed Rate Term and in an
amount approximately equal to the principal amount to which such Fixed Rate Term
applies. Borrower understands and agrees that Bank may base its quotation of the
Inter-Bank Market Offered Rate upon such offers or other market indicators of
the Inter-Bank Market as Bank in its discretion deems appropriate including, but
not limited to, the rate offered for U.S. dollar deposits on the London
Inter-Bank Market.

                  (ii) "LIBOR Reserve Percentage" means the reserve percentage
prescribed by the Board of Governors of the Federal Reserve System (or any
successor) for "Eurocurrency Liabilities" (as defined in Regulation D of the
Federal Reserve Board, as amended), adjusted by Bank for expected changes in
such reserve percentage during the applicable Fixed Rate Term.

         (f) "Prime Rate" means at any time the rate of interest most recently
announced within Bank at its principal office as its Prime Rate, with the
understanding that the Prime Rate is one of Bank's base rates and serves as the
basis upon which effective rates of interest are calculated for those loans
making reference thereto, and is evidenced by the recording thereof after its
announcement in such internal publication or publications as Bank may designate.

         (g) "Total Funded Debt" shall have the meaning ascribed to it in the
Credit Agreement.

INTEREST:

         (a) INTEREST. The Borrower agrees to pay interest at the Bank's address
listed above on the unpaid principal note hereof and, to the extent permitted by
law, the accrued interest in respect hereof from time to time from the date
hereof until payment in full of the principal amount hereof and accrued interest
hereon, at the rates and on the dates set forth on the Addendum attached hereto
and incorporated herein for all purposes.

         (b) SELECTION OF INTEREST RATE OPTIONS. At any time any portion of this
Note bears interest determined in relation to LIBOR, it may be continued by
Borrower at the end the Fixed Rate Term applicable thereto so that all or a
portion thereof bears interest determined in relation to the Base Rate or to
LIBOR for a new Fixed Rate Term designated by Borrower. At any time any portion
of this Note bears interest determined in relation to the Base Rate, Borrower
may convert all or a portion thereof so that it bears interest determined in
relation to LIBOR for a Fixed Rate Term designated by Borrower. At the time this
Note is disbursed or Borrower wishes to select a LIBOR option for all or a
portion of the outstanding principal balance hereof, and at the end of each
Fixed Rate Term, Borrower shall give Bank notice specifying: (i) the interest
rate option selected by Borrower; (ii) the principal amount subject thereto; and
(iii) for each LIBOR selection, the length of the applicable Fixed Rate Term.
Any such notice may be given by telephone (or such other electronic method as
Bank may permit) so long as, with respect to each LIBOR selection, (A) if
requested by Bank, Borrower provides to Bank written confirmation thereof not
later than three (3) Business Days after such notice is given, and (B) such
notice is given to Bank prior to 10:00 a.m. on the first day of the Fixed Rate

                                  Exhibit "C"-2
<PAGE>

Term, or at a later time during any Business Day if Bank, at its sole option but
without obligation to do so, accepts Borrower's notice and quotes a fixed rate
to Borrower. If Borrower does not immediately accept a fixed rate when quoted by
Bank, the quoted rate shall expire and any subsequent LIBOR request from
Borrower shall be subject to a redetermination by Bank of the applicable fixed
rate. If no specific designation of interest is made at the time this Note is
disbursed or at the end of any Fixed Rate Term, Borrower shall be deemed to have
made a Base Rate interest selection for this Note or the principal amount to
which such Fixed Rate Term applied.

         (c) TAXES AND REGULATORY COSTS. Borrower shall pay to Bank immediately
upon demand, in addition to any other amounts due or to become due hereunder,
any and all (i) withholdings, interest equalization taxes, stamp taxes or other
taxes (except income and franchise taxes) imposed by any domestic or foreign
governmental authority and related in any manner to LIBOR, and (ii) future,
supplemental, emergency or other changes in the LIBOR Reserve Percentage,
assessment rates imposed by the Federal Deposit Insurance Corporation, or
similar requirements or costs imposed by any domestic or foreign governmental
authority or resulting from compliance by Bank with any request or directive
(whether or not having the force of law) from any central bank or other
governmental authority and related in any manner to LIBOR to the extent they are
not included in the calculation of LIBOR. In determining which of the foregoing
are attributable to any LIBOR option available to Borrower hereunder, any
reasonable allocation made by Bank among its operations shall be conclusive and
binding upon Borrower.

         (d) DEFAULT INTEREST. From and after the maturity date of this Note, or
such earlier date as all principal owing hereunder becomes due and payable by
acceleration or otherwise, the outstanding principal balance of this Note shall
bear interest until paid in full at an increased rate per annum (computed on the
basis of a 360-day year, actual days elapsed, unless such calculation would
result in a usurious rate, in which case interest shall be computed on the basis
of a 365/366-day year, as the case may be, actual days elapsed) equal to four
percent (4%) above the rate of interest from time to time applicable to this
Note, but in no event at a rate greater than the Maximum Rate.

BORROWINGS:

         (a) Borrower may from time to time from the date of this Note up to and
including December 27, 2005, borrow and partially or wholly repay its
outstanding borrowings, subject to all of the limitations, terms and conditions
of this Note and of any document executed in connection with or governing this
Note; provided however, that amounts repaid may not be reborrowed; and provided
further, that the total borrowings under this Note shall not exceed the
principal amount stated above. The unpaid principal balance of this obligation
at any time shall be the total amounts advanced hereunder by the holder hereof
less the amount of principal payments made hereon by or for any Borrower, which
balance may be endorsed hereon from time to time by the holder.

         (b) All Base Rate and LIBOR borrowings shall be in amounts of at least
Ten Thousand and No/100 Dollars ($10,000.00).

                                  Exhibit "C"-3
<PAGE>

         (c) The amount and date of each Base Rate borrowing shall be designated
by an authorized representative of the Borrower requesting such borrowing in
form and substance satisfactory to Bank, at Bank's sole discretion, and such
borrowing request shall be received by the Bank at least one (1) Business Day
prior to the date of such loan, which date shall be a Business Day. Each Base
Rate loan shall be made at the office of the Bank and shall be funded prior to
2:00 p.m. Houston time, on the day so requested and immediately available fund
in the amount so requested.

         (d) The amount and date of each LIBOR borrowing shall be designated by
an authorized representative of the Borrower requesting such borrowing in form
and substance satisfactory to Bank, at Bank's sole discretion, and such
borrowing request shall be received by the Bank at least three (3) Business Days
prior to the date of such loan, which date shall be a Business Day. Each LIBOR
loan shall be made at the office of the Bank and shall be funded prior to 2:00
p.m. Houston time, on the day so requested and immediately available fund in the
amount so requested.

REPAYMENT AND PREPAYMENT:

         (a) REPAYMENT. The Delayed Draw Term Note shall be repaid pursuant to
Section 1.3(c) of the Credit Agreement.

         (b) APPLICATION OF PAYMENTS. Each payment made on this Note shall be
credited first, to any interest then due and second, to the outstanding
principal balance hereof. All payments credited to principal shall be applied
first, to the outstanding principal balance of this Note which bears interest
determined in relation to the Base Rate, if any, and second, to the outstanding
principal balance of this Note which bears interest determined in relation to
LIBOR, with such payments applied to the oldest Fixed Rate Term first.

         (c) PREPAYMENT.

         BASE RATE. Borrower may prepay this Note provided that all terms in the
Credit Agreement and herein are complied with (including the payment of any
prepayment penalties required in the Credit Agreement). As provided herein,
Borrower may prepay principal on any portion of this Note which bears interest
determined in relation to the Base Rate at any time and in the minimum amount of
One Hundred Thousand and No/100 Dollars ($100,000.00); PROVIDED HOWEVER, if the
outstanding principal balance is such portion of this Note is less than said
amount, the minimum prepayment amount shall be the entire outstanding principal
hereof.

         LIBOR. Borrower may prepay this Note provided that all terms in the
Credit Agreement and herein are complied with (including the payment of any
prepayment penalties required in the Credit Agreement). As provided herein,
Borrower may prepay principal on any portion of this Note which bears interest
determined in relation to LIBOR at any time and in the minimum amount of One
Hundred Thousand and No/100 Dollars ($100,000.00) and in One Hundred Thousand
and No/100 Dollars ($100,000.00) multiples thereafter); PROVIDED, HOWEVER, that
if the outstanding principal balance of such portion of this Note is less than
said amount, the minimum prepayment amount shall be the entire outstanding
principal balance thereof. In consideration of Bank providing this prepayment
option to Borrower, or if any such portion of this Note shall become due and
payable at any time prior to the last day of the Fixed Rate Term applicable
thereto, Borrower shall pay to Bank immediately upon demand a fee which is the
sum of the discounted monthly differences for each month from the month of
prepayment through the month in which such Fixed Rate Term matures, calculated
as follows for each such month:

                                  Exhibit "C"-4
<PAGE>

                  (i) Determine the amount of interest which would have accrued
each month on the amount prepaid at the interest rate applicable to such amount
had it remained outstanding until the last day of the Fixed Rate Term applicable
thereto.

                  (ii) Subtract from the amount determined in (i) above the
amount of interest which would have accrued for the same month on the amount
prepaid for the remaining term of such Fixed Rate Term at LIBOR in effect on the
date of prepayment for new loans made for such term and in a principal amount
equal to the amount prepaid.

                  (iii) If the result obtained in (ii) for any month is greater
than zero, discount that difference by LIBOR used in (ii) above.

Each Borrower acknowledges that prepayment of such amount may result in Bank
incurring additional costs, expenses and/or liabilities, and that it is
difficult to ascertain the full extent of such costs, expenses and/or
liabilities. Each Borrower, therefore, agrees to pay the above-described
prepayment fee and agrees that said amount represents a reasonable estimate of
the prepayment costs, expenses and/or liabilities of Bank.

In addition, if Borrower makes an optional or required prepayment of a LIBOR
loan before the end of the related interest period, or fails to borrow, convert,
or extend a LIBOR loan after giving notice thereof, of if a LIBOR loan is
converted to Base Rate Loan as a result of certain changes and circumstances,
Borrower will reimburse Bank for any related funding losses and losses of
anticipated earnings.

All prepayments of principal on this Note, whether such prepayment is in
relation to a Base Rate option or a LIBOR option shall be applied first to
reduce the balloon payment due upon maturity hereof, if applicable, and second
to reduce the most remote of the principal installment or installments then
unpaid.

EVENTS OF DEFAULT:

         This Note is made pursuant to and is subject to the terms and
conditions of that certain Amended and Restated Credit Agreement between
Borrower and Bank dated as of even date herewith (as amended from time to time
the "Credit Agreement"). Any default in the payment or performance of any
obligation under this Note, or any defined event of default under the Credit
Agreement, shall constitute an "Event of Default" under this Note.

MISCELLANEOUS:

         (a) REMEDIES. Upon the occurrence of any Event of Default, the holder
of this Note, at the holder's option, may declare all sums of principal and
accrued and unpaid interest outstanding hereunder to be immediately due and
payable without presentment, demand, or any notices of any kind, including
without limitation notice of nonperformance, notice of protest, protest, notice
of dishonor, notice of intention to accelerate or notice of acceleration, all of
which are expressly waived by each Borrower, and the obligation, if any, of the

                                  Exhibit "C"-5
<PAGE>

holder to extend any further credit hereunder shall immediately cease and
terminate. Each Borrower shall pay to the holder immediately upon demand the
full amount of all payments, advances, charges, costs and expenses, including
reasonable attorneys' fees (to include outside counsel fees and all allocated
costs of the holder's in-house counsel to the extent permissible), expended or
incurred by the holder in connection with the enforcement of the holder's rights
and/or the collection of any amounts which become due to the holder under this
Note, and the prosecution or defense of any action in any way related to this
Note, including without limitation, any action for declaratory relief, whether
incurred at the trial or appellate level, in an arbitration proceeding or
otherwise, and including any of the foregoing incurred in connection with any
bankruptcy proceeding (including without limitation, any adversary proceeding,
contested matter or motion brought by Bank or any other person) relating to any
Borrower or any other person or entity.

         (b) OBLIGATIONS JOINT AND SEVERAL. Should more than one person or
entity sign this Note as a Borrower, the obligations of each such Borrower shall
be joint and several.

         (c) GOVERNING LAW. THIS NOTE SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF TEXAS. THIS NOTE IS PERFORMABLE IN
HARRIS COUNTY, TEXAS. ANY ACTION OR PROCEEDING UNDER OR IN CONNECTION WITH THIS
NOTE AGAINST THE BORROWER OR ANY THIRD PARTY OBLIGOR MAY BE BROUGHT IN ANY STATE
OR FEDERAL COURT IN HARRIS COUNTY, TEXAS. BORROWER AND EACH THIRD PARTY OBLIGOR
HEREBY IRREVOCABLY (I) SUBMITS TO THE NON-EXCLUSIVE JURISDICTION OF SUCH COURTS,
AND (II) WAIVES ANY OBJECTION IT MAY NOW OR HEREAFTER HAVE AS TO THE VENUE OF
ANY SUCH ACTION OR PROCEEDING BROUGHT IN SUCH COURT OR THAT SUCH COURT IS AN
INCONVENIENT FORUM. NOTHING HEREIN SHALL AFFECT THE RIGHT OF THE BANK TO BRING
ANY ACTION OR PROCEEDING AGAINST THE BORROWER OR ANY THIRD PARTY OBLIGOR OR WITH
RESPECT TO ANY COLLATERAL IN ANY STATE OR FEDERAL COURT IN ANY OTHER
JURISDICTION. ANY ACTION OR PROCEEDING BY THE BORROWER OR ANY THIRD PARTY
OBLIGOR AGAINST LENDER SHALL BE BROUGHT ONLY IN A COURT LOCATED IN HARRIS
COUNTY, TEXAS.

         (d) SAVINGS CLAUSE. It is the intention of the parties to comply
strictly with applicable usury laws. Accordingly, notwithstanding any provision
to the contrary in this Note, or in any contract, instrument or document
evidencing or securing the payment hereof or otherwise relating hereto (each, a
"Related Document"), in no event shall this Note or any Related Document require
the payment or permit the payment, taking, reserving, receiving, collection or
charging of any sums constituting interest under applicable laws that exceed the
maximum amount permitted by such laws, as the same may be amended or modified
from time to time (the "Maximum Rate"). If any such excess interest is called
for, contracted for, charged, taken, reserved or received in connection with
this Note or any Related Document, or in any communication by Bank or any other
person to Borrower or any other person, or in the event that all or part of the
principal or interest hereof or thereof shall be prepaid or accelerated, so that
under any of such circumstances or under any other circumstance whatsoever the
amount of interest contracted for, charged, taken, reserved or received on the
amount of principal actually outstanding from time to time under this Note shall
exceed the Maximum Rate, then in such event it is agreed that: (i) the
provisions of this paragraph shall govern and control; (ii) neither Borrower nor

                                  Exhibit "C"-6
<PAGE>

any other person or entity now or hereafter liable for the payment of this Note
or any Related Document shall be obligated to pay the amount of such interest to
the extent it is in excess of the Maximum Rate; (iii) any such excess interest
which is or has been received by Bank, notwithstanding this paragraph, shall be
credited against the then unpaid principal balance hereof or thereof, or if this
Note or any Related Document has been or would be paid in full by such credit,
refunded to Borrower; and (iv) the provisions of this Note and each Related
Document, and any other communication to Borrower, shall immediately be deemed
reformed and such excess interest reduced, without the necessity of executing
any other document, to the Maximum Rate. The right to accelerate the maturity of
this Note or any Related Document does not include the right to accelerate,
collect or charge unearned interest, but only such interest that has otherwise
accrued as of the date of acceleration. Without limiting the foregoing, all
calculations of the rate of interest contracted for, charged, taken, reserved or
received in connection with this Note and any Related Document which are made
for the purpose of determining whether such rate exceeds the Maximum Rate shall
be made to the extent permitted by applicable laws by amortizing, prorating,
allocating and spreading during the period of the full term of this Note or such
Related Document, including all prior and subsequent renewals and extensions
hereof or thereof, all interest at any time contracted for, charged, taken,
reserved or received by Bank. The terms of this paragraph shall be deemed to be
incorporated into each Related Document.

         To the extent that either Chapter 303 or 306, or both, of the Texas
Finance Code apply in determining the Maximum Rate, Bank hereby elects to
determine the applicable rate ceiling by using the weekly ceiling from time to
time in effect, subject to Bank's right subsequently to change such method in
accordance with applicable law, as the same may be amended or modified from time
to time.

         (e) RIGHT OF SETOFF; DEPOSIT ACCOUNTS. Upon and after the occurrence of
an Event of Default, (i) Borrower hereby authorizes Bank, at any time and from
time to time, without notice, which is hereby expressly waived by Borrower, and
whether or not Bank shall have declared this Note to be due and payable in
accordance with the terms hereof, to set off against, and to appropriate and
apply to the payment of, Borrower's obligations and liabilities under this Note
(whether matured or unmatured, fixed or contingent, liquidated or unliquidated),
any and all amounts owing by Bank to Borrower (whether payable in U.S. dollars
or any other currency, whether matured or unmatured, and in the case of
deposits, whether general or special (except trust and escrow accounts), time or
demand and however evidenced), and (ii) pending any such action, to the extent
necessary, to hold such amounts as collateral to secure such obligations and
liabilities and to return as unpaid for insufficient funds any and all checks
and other items drawn against any deposits so held as Bank, in its sole
discretion, may elect. Borrower hereby grants to Bank a security interest in all
deposits and accounts maintained with Bank and with any other financial
institution to secure the payment of all obligations and liabilities of Borrower
to Bank under this Note.

         (f) BUSINESS PURPOSE. Borrower represents and warrants that all loans
evidenced by this Note are for a business, commercial, investment, agricultural
or other similar purpose and not primarily for a personal, family or household
use.

                                  Exhibit "C"-7
<PAGE>

NOTICE: THIS NOTE AND ALL OTHER DOCUMENTS RELATING TO THE INDEBTEDNESS EVIDENCED
HEREBY CONSTITUTE A WRITTEN LOAN AGREEMENT WHICH REPRESENTS THE FINAL AGREEMENT
BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR,
CONTEMPORANEOUS OR SUBSEQUENT ORAL AGREEMENTS OF THE PARTIES. THERE ARE NO
UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES RELATING TO THIS NOTE AND THE
INDEBTEDNESS EVIDENCED HEREBY.

         This Note is in renewal and increase of, but not in novation or
discharge of, that certain Delayed Draw Term Note dated as of June 27, 2003 in
the principal amount of $1,000,000.00, executed by the Borrower and payable to
the order of the Bank.

         IN WITNESS WHEREOF, the undersigned has executed this Note as of the
date first written above.

                                             AIRCOMP L.L.C.

                                             By: /s/ Terry Keane
                                                 -------------------------------
                                                 Terry Keane
                                                 President

                                  Exhibit "C"-8
<PAGE>

                       ADDENDUM TO DELAYED DRAW TERM NOTE
                      (BASE RATE/LIBOR PRICING ADJUSTMENTS)

         THIS ADDENDUM is attached to and made a part of that certain promissory
note executed by AIRCOMP, L.L.C., a Delaware limited liability company
("Borrower") and payable to WELLS FARGO BANK, NATIONAL ASSOCIATION ("Bank"), or
order, dated as of even date herewith, in the principal amount of One Million
Five Hundred Thousand and No/100 Dollars ($1,500,000.00) (the "Note").

         The following provisions are hereby incorporated into the Note to
reflect the interest rate adjustments agreed to by Bank and Borrower:

INTEREST RATE ADJUSTMENTS:

         (a) INITIAL INTEREST RATES. The initial interest rates applicable to
this Note shall be the rates set forth in the "Interest" paragraph herein.

         (b) INTEREST RATE ADJUSTMENTS. In addition to any interest rate
adjustments resulting from changes in the Base Rate, Bank shall adjust the Base
Rate and LIBOR margins used to determine the rates of interest applicable to
this Note on a quarterly basis, commencing with the calendar quarter ending
December 31, 2004, if required to reflect a change in Borrower's ratio of Total
Funded Debt to EBITDA (as defined in the Credit Agreement referenced herein, in
accordance with the following grid:

                                                 APPLICABLE       APPLICABLE
TOTAL FUNDED DEBT                                 BASE RATE         LIBOR
TO EBITDA                                          MARGIN           MARGIN
---------                                          ------           ------

    less than 2.0 to 1.0                            .25%             2.00%

    greater than or equal to 2.0 to 1.0
    but less than 2.5 to 1.0                        .50%             2.25%

    greater than or equal to 2.5 to 1.0
    but less than 3.0 to 1.0                        .75%             2.50%

    greater than or equal to 3.0 to 1.0             1.00%            2.75%

Each such adjustment shall be effective on the first Business Day of the
calendar quarter following the quarter during which Bank receives and reviews
Borrower's most current quarter-end financial statements in accordance with any
requirements established by Bank for the preparation and delivery thereof.

         (c) With respect to LIBOR loans, each interest payment shall be payable
on the last day of each Fixed Rate Term (as defined in the Credit Agreement)
elected by the Borrower and upon maturity of the Note; provided, however, in the
event Borrower elects a six-month Fixed Rate Term, then such installments of
interest shall be due and payable on the last day of the third month of such
Fixed Rate Term.

                                  Exhibit "C"-9
<PAGE>

         (d) With respect to Base Rate loans, each interest payment shall be
payable on the last day of each March, June, September and December commencing
on December 31, 2004, through and including maturity of this Note.

         IN WITNESS WHEREOF, this Addendum has been executed as of the same date
as the Note.

                                             AIRCOMP L.L.C.

                                             By: /s/ Terry Keane
                                                 -------------------------------
                                                 Terry Keane
                                                 President

                                 Exhibit "C"-10
<PAGE>

                                   EXHIBIT "D"
                                   -----------

                                  Documentation

1. Amended and Restated Credit Agreement
2. (Renewed and Increased) Line of Credit Note
3. (Renewed) Term Note
4. (Renewed and Increased) Delayed Draw Term Note
5. Second Amendment to Subordination Agreement executed by Borrower, M-I L.L.C.,
   as Creditor, and Lender
6. 26.02 Notice (Notice of No Oral Agreements)
7. Amended and Restated Security Agreement of Borrower to Lender individually
   and as Collateral Agent
8. Amended and Restated Third Party Pledge Agreement of Borrower's Membership
   Units by MI-LLC

                                  Exhibit "D"-1
<PAGE>

                                   EXHIBIT "E"
                                   -----------

              Wells Fargo Commercial MasterCard Customer Agreement

                             Effective June 27, 2003

This Agreement governs the Wells Fargo Commercial MasterCard Account
("Account"), which consists of a master account ("Master Account") and sub
accounts for which a Wells Fargo Commercial MasterCard credit card bearing a
distinct account number and credit limit for use by the authorized
representative of Customer (as defined below) whose name is imprinted on the
MasterCard ("Authorized User"), each, a ("Sub Account"). Wells Fargo Bank,
National Association ("Bank") agrees to establish the Account for use by your
BUSINESS ORGANIZATION ("Customer") and your Authorized Users. Customer will be
bound by the terms and conditions of the Agreement from the time the Master
Account is opened. Use of the Master Account, or a request for a transfer from
the Master Account or any Sub Account by an Authorized User or anyone else
authorized by Customer, shall further evidence Customer's acceptance of the
terms and conditions of this MasterCard Customer Agreement, including but not
limited to the various charges stated herein. The Account shall be used for
business purposes only. Customer agrees to comply with each and every term and
condition of this Agreement as set forth below:

PROMISE TO PAY. Customer agrees to pay Bank, when due, the total of all
purchases and advances made on the Account (both Master Account and each Sub
Account). Customer also promises to pay the total of any Finance Charges and
Other Charges due on an Account, as stated in this Agreement, and all costs and
expenses, including any attorney's fees, incurred in enforcing this Agreement.
If an Account is approved subject to the provision of a personal guarantee, both
the Customer and the signing guarantor shall be jointly and severally liable for
repayment of all amounts due on the Account under this Agreement.

CARD SERVICES. Customer will be issued one or more MasterCard credit cards, as
requested by Customer. If Customer requests a Sub Account without a
representative's name imprinted thereon, or a Sub Account without an associated
credit card, any user of that Sub Account shall be deemed an Authorized User.
Except as noted below, the following services are available, up to the amount of
the Credit Limit on each individual Sub Account:

PURCHASES. A MasterCard credit card may be used to PURCHASE FUEL AND MAINTENANCE
(AND OTHER GOODS AND SERVICES if agreed in writing by Bank and Customer)
wherever MasterCard(R) credit cards are accepted. Bank reserves the right and at
its sole discretion to block purchases at high-risk merchants and countries, as
determined by Bank in its sole discretion. If Customer or any Authorized User
will be traveling outside the United States and Canada, Customer shall advise
Bank prior to departure in order to determine whether the card is blocked in
that territory.

CASH ADVANCES: If agreed in writing by Bank and Customer, and subject to
availability of credit, cash in an amount up to 20% of the Credit Limit
allocated to an Account or Sub Account may be advanced from that account by
presenting the MasterCard credit card at a financial institution or an automated
teller machine (ATM) that accepts MasterCard credit cards. Customer and any
Authorized User may also obtain Cash Advances at all Wells Fargo, Cirrus(R), or
MasterCard ATMs by using its MasterCard credit card with a personal
identification number (PIN).

                                  Exhibit "E"-1
<PAGE>

CREDIT LIMIT. The Credit Limit of an Account is shown on each of the monthly
periodic (billing) statements issued for that Account. Customer agrees not to
use or permit the use of an Account, including any Sub Account, in any way that
will cause an Account to exceed its Credit Limit. If an Account's Credit Limit
is exceeded, Bank may, at its option, close that Account (or Sub Account) or
exercise any of its other remedies under this Agreement.

PAYMENT
-------

PERIODIC PAYMENTS. Customer will receive a periodic statement every month that
covers each Account, including each Sub Account, unless Customer chooses
Individual Bill, in which case each Sub Account will receive a separate
statement. The New Balance shown on the statement will be the total of all
unpaid obligations that have been posted to that Account as of the Closing Date
shown on the statement. Customer may pay the Minimum Periodic Payment due or any
greater amount, but Bank must receive at least the Minimum Periodic Payment, in
immediately available U.S. funds drawn on a U.S. Bank, by the date shown on the
statement. Bank may refuse to accept any payments by third party check or draft
that has been endorsed to us or that have been drawn by anyone other than
Customer or an Authorized User.

Unless the Account is non-revolving, the Minimum Periodic Payment is equal to 2%
of the current balance ($10 MINIMUM) plus any amount past due. If the Account is
non-revolving, the Minimum Periodic Payment is equal to the New Balance shown on
the statement. Customer may be required to have payments automatically deducted
from its checking or savings account.

Payments to be credited to an Account will be applied in an order determined by
us. Bank may accept checks marked "Payment in Full" or with words of similar
effect without losing any of its rights to collect the full balance of an
Account.

Bank may, at its discretion, withhold a portion of the available Credit Limit on
the Account up to the amount of any payment(s) in order to assure that the check
or other payment instrument is honored.

FINANCE CHARGE. The total Finance Charge is the sum of the Periodic Finance
Charge plus the Transaction Finance Charge assessed on the Account to which it
pertains for the billing. The method used to determine the balance or balances
upon which these finance charges are computed is as follows:

A.       FINANCE CHARGE: The Periodic Finance Charge is figured on the Closing
         Date by multiplying the Average Daily Balance of the account by the
         Monthly Periodic Rate.

MONTHLY PERIODIC RATE: The Monthly Periodic Rate will be either a fixed or
variable rate. You will receive separate notification from the Bank regarding
your rate.

o        FIXED RATE: If your rate is a fixed rate, the Monthly Periodic Rate
         will be calculated by dividing your fixed rate by 12 (rounded to the
         nearest 1/1,000th).

                                  Exhibit "E"-2
<PAGE>

o        VARIABLE RATE: If your rate is a variable rate, the Monthly Periodic
         Rate will be based upon the PRIME Rate plus the Spread. The "Prime
         Rate" is the rate announced by the Bank as its "Prime Rate," in effect
         on the 15th of each month (Determination Date). If the Determination
         Date falls on a Saturday, Sunday or holiday, the next business day will
         be used as the Determination Date. The Monthly Periodic Rate will be
         calculated by taking the Prime Rate, as described above, adding the
         Spread (previously provided separately to Customer) and dividing that
         sum by 12 (rounded to the nearest 1/1000th).

         The Monthly Periodic Rate will change each month as the Prime Rate
         changes. Any increase or decrease in the Monthly Periodic Rate will be
         effective with billing periods beginning on or after the last day of
         each month, based on the Prime Rate as of the Determination Date for
         the preceding month. If there is no increase or decrease in the Prime
         Rate for a given month, then there will be no change in the Monthly
         Periodic Rate until the next calculation. Any changes in the Monthly
         Periodic Rate will apply to both current and future balances on the
         Account and the Monthly Periodic Rate will continue to vary even if the
         Account is closed.

CALCULATION OF AVERAGE DAILY BALANCE: The Average Daily Balance is calculated by
figuring the Daily Balance for each day in the billing period, adding all of the
Daily Balances together, and then dividing that total amount by the number of
days in the billing period. The Daily Balance is figured by starting with the
beginning balance of the Account each day and then:

o        Adding the amount of all new purchases, advances, fees and finance
         charges, posted to the Account as of that day, and

o        Subtracting the amount of any payments or credits that are credited to
         the Account as of that day, and any unpaid Other Charges.

The Average Daily Balance on which the Periodic Finance Charge is calculated
will not include any part of the New Balance from the previous periodic
statement or any new purchases posted to the Account during the current billing
period, if that New Balance is paid by the Payment Due Date shown on that
previous statement, or if that New Balance was zero. In that case, the Average
Daily Balance will be based only on the new Cash Advances during the current
billing period.

B.       TRANSACTION FINANCE CHARGE: The Transaction Finance Charge is a
         one-time charge made each time a new advance is posted to the Account.
         The charge for each MasterCard Cash Advance obtained through any
         source, including a Wells Fargo automated teller machine or any other
         Automated Teller Machine, whether the cash is withdrawn or transferred
         to another account, is 3% of the amount of the advance with a $4.00
         minimum and no maximum.

C.       MINIMUM FINANCE CHARGE: There will be a Minimum Finance Charge of $1.00
         for each billing period in which a Monthly Periodic Finance Charge is
         payable.

                                  Exhibit "E"-3
<PAGE>

WHEN FINANCE CHARGE BEGINS. The Periodic Finance Charge for purchases begins on
the date the transaction was made, except that no Periodic Finance Charge will
be imposed during the current billing period on new purchases posted to an
Account during the current billing period if Customer has paid in full the New
Balance by the Payment Due Date shown on the previous periodic statement. If
Bank receives payment in full of the New Balance by the Payment Due Date, no
additional Finance Charge will be imposed on that New Balance. This 25-day
period is referred to as the "grace" period and applies to Purchases only and
not Cash Advances. The Periodic Finance Charge for advances begins on the date
the transaction is posted to an Account.

OTHER CHARGES
The total of Other Charges is the sum of:

ANNUAL FEES: Bank may assess an Annual Fee for the first year and each year
thereafter for each Account. Please refer to separate correspondence for pricing
details.

Fees will not be refunded in whole or in part after assessment, even if the
Account is subsequently suspended, closed, or terminated for any reason.

LATE CHARGE: If Bank does not receive at least the Minimum Periodic Payment by
the Payment Due Date shown on the periodic statement, Bank may impose a late
charge as follows: Individual billing: A $35.00 late fee may be assessed.
Corporate billing: A $75.00 late fee may be assessed. For Accounts that have
been delinquent three times or more in the past 12 billing cycles, Bank may
impose a late charge of $50.00.

OVERLIMIT CHARGE: Bank may impose an overlimit charge of $35.00 for any charge
that causes an Account (either corporate or individual) to exceed its assigned
Credit Limit.

RETURNED ITEM CHARGE: If payment on an Account is made with an item that is not
honored for any reason, a $35.00 charge may be assessed to the Account. If
Customer pays more than one Account with an item, a $35.00 charge may be
assessed to each affected Account.

RESEARCH CHARGE: If Customer requests the Bank to research an Account, for
example, to update Customer's business records, $5.00 may be charged for each
sales slip copy Bank provides, $3.00 may be charged for each monthly statement
Bank provides and $20.00 may be charged per hour for other Bank research
services. These fees will not be charged if Customer makes a good faith inquiry
about a suspected error on a periodic statement.

RUSH CHARGE: If Customer requests expedited Cards, Bank may charge a fee of
$30.00 per card.

REPORTING CHARGE: Bank may charge a fee for certain paper or electronic reports.
For Customers that choose electronic reporting, a charge may be assessed for the
level of reporting requested. Please refer to separate correspondence for fee
information.

DEFAULT. The following constitute defaults under this Agreement: (1) a payment
is not made when it is due; (2) the terms of this Agreement are breached in any
way; (3) Customer defaults under the terms of any other obligation to Bank or
anyone else; (4) a bankruptcy petition is filed by or against Customer or any
guarantor of Customer's Account; (5) a significant change occurs in the
ownership or organizational structure of Customer or in the type or volume of
Customer's business; (6) Customer becomes insolvent or is dissolved, or Bank
otherwise believes in good faith that the prospect of payment and/or performance
under this Agreement is impaired; (7) items are returned for insufficient funds;
(8) Customer fails to submit required information the Bank deems necessary.
Customer will be charged the applicable Monthly Periodic Rate after any default
under this Agreement.

                                  Exhibit "E"-4
<PAGE>

BANKER'S LIEN AND RIGHT OF SET-OFF. Bank has a general lien under California law
on any of Customer's personal property in Bank's possession. In the event
Customer does not make payment on an Account as agreed, Bank may exercise its
right of set-off against any obligation Bank owes to Customer, including a
set-off against any deposit account(s) Customer has with Bank or any of its
affiliates to the extent permitted by law.

REMEDIES.In the event of any default or failure to meet any condition under the
preceding paragraphs, Bank may, at its option, and without prior notification:

(1)      close any or all Accounts to all use;

(2)      accelerate payment of the full balance on any or all Accounts and
         thereby require immediate payment of the full balance of such Accounts
         including, without limitation, any Finance Charge and Other Charges;
         and/or

(3)      fix minimum monthly Account payments at a higher amount.

ARBITRATION PROGRAM

(a)      BINDING ARBITRATION. Upon the demand of any party, any Dispute shall be
         resolved by binding arbitration in accordance with the terms of this
         Arbitration Program. A "Dispute" shall include any action, dispute,
         claim, or controversy of any kind, whether in contract or in tort,
         legal or equitable, now existing or hereafter arising between the
         parties relating in any way to any agreement incorporating this
         Arbitration Program, or any related agreements (the "Documents"), and
         all past, present, or future loans, transactions, contracts,
         agreements, relationships, incidents or injuries of any kind
         whatsoever. Any party to this Arbitration Program may by summary
         proceedings bring any action in court to compel arbitration of any
         Dispute. Any party who fails to submit to binding arbitration following
         a lawful demand by the opposing party shall bear all costs and expenses
         incurred by the opposing party in compelling arbitration of any
         Dispute. The parties agree that by engaging in activities with or
         involving each other as described above, they are participating in
         transactions involving interstate commerce. The parties understand that
         by this agreement they have decided that their disputes shall be
         resolved by binding arbitration rather than in court, and once decided
         by arbitration no dispute can later be brought, filed or pursued in
         court before a judge or jury, except under the limited circumstances
         provided for herein.

(b)      GOVERNING RULES, PRESERVATION OF REMEDIES; MULTIPLE PARTIES. All
         Disputes between the parties submitted to arbitration shall be resolved
         by binding arbitration administered by the American Arbitration
         Association (the "AAA" or "Administrator") in accordance with the
         Commercial Arbitration Rules of the AAA, the Federal Arbitration Act
         (Title 9 of the United States Code), and to the extent the foregoing
         are inapplicable, unenforceable or invalid, the applicable substantive

                                  Exhibit "E"-5
<PAGE>

         law designated in the Documents relating to the Dispute. In the event
         of any inconsistency between this Arbitration Program and such rules
         and statutes, this Arbitration Program shall control. Judgment upon any
         award made hereunder may be entered in any court having jurisdiction.
         Any claim or dispute related to the exercise of any self-help,
         auxiliary or other rights under this paragraph shall be a Dispute
         hereunder. However, no provision of, nor the exercise of any rights
         under, this Arbitration Program shall limit the right of any party,
         during any Dispute, to seek, use, and employ ancillary or preliminary
         remedies, judicial or otherwise, for the purposes of (1) preserving,
         foreclosing, or obtaining possession of real or personal property, (2)
         exercising self-help remedies including set-off and repossession
         rights, or (3) obtaining provisional or ancillary remedies such as
         injunctive relief, sequestration, attachment, garnishment, or the
         appointment of a receiver from a court having jurisdiction. Such rights
         can be exercised at any time, unless contrary to a final award or
         decision in an arbitration proceeding, and shall not constitute a
         waiver of the arbitration rights of any party. Any party may proceed
         against all liable persons, jointly or severally, or against any one or
         more of them, and may release or settle with any of them, without
         impairing rights against other liable persons. Any arbitrator selected
         shall be a practicing attorney experienced and knowledgeable in the
         substantive laws applicable to the subject matter of the Dispute, or a
         retired member of the state or federal judiciary. The determination of
         the arbitrator shall be binding on all parties and shall not be subject
         to further review or appeal except as otherwise allowed by applicable
         law. Notwithstanding contrary provisions herein, no Dispute shall be
         submitted to arbitration if the Dispute concerns indebtedness secured
         by real property and if arbitration of the Dispute would preclude
         enforcement of a mortgage, lien or security interest securing such
         indebtedness.

(c)      MISCELLANEOUS. To the maximum extent practicable, the AAA, the
         Arbitrator and the parties shall act to assure that any arbitration
         proceeding shall be concluded within 180 days of the filing of the
         Dispute with the AAA. Arbitration proceedings hereunder shall be
         conducted at a location mutually agreeable to the parties, or if they
         cannot agree, then in the state of the applicable substantive law
         designated in the Documents relating to the Dispute at a location
         selected by the Administrator. With respect to any Dispute, each party
         agrees that all discovery activities shall be expressly limited to
         matters directly relevant to the Dispute. Neither party, nor the
         arbitrator may disclose the existence, content, or results of any
         arbitration hereunder, except for disclosures of information required
         in the ordinary course of business of the parties or by applicable law
         or regulation. This Arbitration Program shall be construed in
         accordance with the Federal Arbitration Act, other applicable Federal
         law, and applicable law of the State of California. This Arbitration
         Program constitutes the entire agreement of the parties with respect to
         its subject matter and supersedes all prior arrangements and other
         communications on dispute resolution, except with respect to Disputes
         relating to any transaction directly governed by a different
         arbitration program entered into by the parties after January 1, 2001.
         In the event more than one arbitration program entered into by the
         parties is potentially applicable to a Dispute, the arbitration program
         most directly related to the Documents or transaction that is the
         subject of the Dispute shall control. The provisions of this
         Arbitration Program shall survive any termination, amendment, or
         expiration of the Documents or the relationship. This Arbitration
         Program may be amended, changed, or modified only by a specific
         modification in writing agreed to by all affected parties. If any term,
         covenant, condition or provision of this Arbitration Program is found
         to be unlawful, invalid or unenforceable, such defect shall not affect
         the legality, validity or enforceability of the remaining parts of this
         Arbitration Program, and all such remaining parts hereof shall be valid
         and enforceable and have full force and effect as if the illegal,
         invalid or unenforceable part had not been included.

                                  Exhibit "E"-6
<PAGE>

LIMITATION ON LAWSUITS. Customer agrees that any lawsuit based upon any cause of
action which Customer may have against Bank must be filed within one year from
the date that it arises or Customer will be barred from filing the lawsuit. This
limitation is intended to include tort, contract, and all other causes of action
for which Customer and Bank may lawfully contract to set limitations for
bringing suit.

TRANSFERS. Customer authorizes Bank to make transfers, up to the available
balance or Credit Limit, between designated accounts specified in writing, upon
Bank's receipt of instructions from any of Customer's OWNERS, PRINCIPALS, OR
AUTHORIZED REPRESENTATIVES Bank shall have no liability for any transfer made
upon the written or verbal request of any person believed by Bank in good faith
to be an Authorized Representative of Customer. Customer shall indemnify and
hold Bank harmless from and against any damages, liabilities, costs or expenses
(including attorney's fees) arising out of any claim by Customer or any third
party against Bank in connection with Bank's performance of transfers as
described above.

FOREIGN TRANSACTIONS. Customer agrees to pay Bank in U.S. dollars for charges to
the Account incurred in any other currency. Foreign transactions are normally
converted to U.S. dollars by a foreign financial institution, which may impose a
fee for its services. Since conversion may occur after the date of a
transaction, the conversion rate may be different from the rate in effect at the
time of the transaction. You agree to pay us the transaction amount as converted
by the foreign institution, as well as any conversion fees that are imposed by
the other institution.

CREDIT REPORTS, RE-EVALUATION OF CREDIT AND INFORMATION SHARING WITH AFFILIATES.
Customer and each individual or entity who on behalf of Customer or as a
guarantor of Customer's obligations hereunder has signed an agreement with Bank
authorizes Bank to obtain business and personal credit bureau reports in the
name of the Customer and such individual(s) at any time. Customer agrees to
submit current financial information in the name of the Customer and such
individuals to Bank at any time upon request. Such information shall be used for
the purposes for evaluating or re-evaluating Customer's and such individuals'
creditworthiness. Upon determination that Customer's or such individuals'
creditworthiness has changed adversely or does not satisfy Bank's current credit
standards, Bank may close or lower the Credit Limit on any or all Accounts. Bank
may report its credit experience with Customer, its Account(s) and such
individuals to third parties. Customer and each individual signing on behalf of
Customer or as a guarantor agrees that Bank may release information about
Customer, such individual(s) or Customer's Account to other Wells Fargo
companies and affiliates.

RIGHT TO TERMINATE AN ACCOUNT. Bank may terminate any or all of Customer's
Accounts, including both the Master Account and Sub Accounts, at any time, or
reduce the amount of Customer's Credit Limit on any or all of its Accounts,
without notice, subject to applicable law, even though Customer may not have
defaulted on any Account. If Bank terminates an Account, Customer agrees to
destroy any MasterCard Card(s) issued on that Account. Customer will continue to
be responsible for full payment of the balance on the closed Account, including
both the Master Account and Sub Accounts, and all charges to those Accounts,
including, without limitation, MasterCard Purchases and Cash Advances that post
after closure of the Account and any Finance Charge and Other Charges. Any owner
of Customer may cancel the Account at any time upon written notification to
Bank.

                                  Exhibit "E"-7
<PAGE>

CHANGE IN TERMS OF AN ACCOUNT. Bank may change any of the terms of any of
Customer's Accounts (including payment terms and finance charges) at any time.
Bank will provide Customer with such notice as is required by law, by mailing
such notice to Customer at the latest address shown in Bank's records. Subject
to applicable law and provided Bank does not notify Customer otherwise, any
changes will apply to the current balance of its Accounts as well as to future
balances. Customer may refuse a Change in Terms by giving written instructions
to Bank within 15 days of the notice to close the Account and by immediately
paying off the balance in full on the Account

LIABILITY FOR UNAUTHORIZED USE. Bank may hold Customer liable for the
unauthorized use of any MasterCard Credit Card issued to or at the request of
Customer to a maximum of $50.00. Customer will not be liable for any
unauthorized use that occurs after Bank is notified orally or in writing of such
unauthorized use. However, if Customer has requested and been issued 10 or more
MasterCard Cards or if Customer has requested and been issued Master Card cards
with only a department or other name (without identification of a specific
Authorized User), Customer shall be liable for all unauthorized use of such
cards, in any amount, at any time In all other circumstances:

o        Customer shall be liable for unauthorized use by Customer or Authorized
         User. MasterCoverage(R) may apply,

o        Customer shall have no liability for unauthorized use by someone other
         than Customer or an Authorized User.

Customer agrees to notify Bank within 48 hours of an Authorized User's departure
from the Company so the Account can be closed. To report the unauthorized use of
a MasterCard credit card, Customer shall contact Bank by telephone at the number
shown on the front of its periodic statement and on the form in which the
MasterCard Card was sent. Customer shall notify Bank in writing at Wells Fargo,
P.O. Box 84049, Columbus, GA 31908-4049.

CARDS ISSUED IN DEPARTMENT NAMES. If Customer requests cards or Accounts to be
issued in the name of a Department, Customer will be liable for all
transactions. Customer and Authorized Users shall not present the card in a
face-to-face transaction and shall reserve the card for use in telephone,
Internet and mail order purchases only. Customer acknowledges that issuance of
such cards may result in forfeiture some coverages provided under MasterCard
benefit programs that require the user of the card to be identified by name.
Such coverages include but are not limited to travel assistance benefits and
rental car insurance. Customer further acknowledges that issuance of such cards
also may result in forfeiture of certain chargeback rights and that Customer may
lose the right to dispute and request chargeback of purchases, including
requests based upon a transaction not having been made by Customer or an
Authorized User, cards bearing an invalid expiration date, and counterfeit
magnetic strip/POS fraud.

                                  Exhibit "E"-8
<PAGE>

BILLING ERROR. Customer agrees to notify Bank of any billing errors within 30
days after receipt of statement reflecting the error. If Bank is unable to
resolve the error with the responsible merchant, Customer agrees to pay Bank the
amount in question and further pursuit of the issue with the merchant shall
become Customer's responsibility.

LAW GOVERNING THIS AGREEMENT. THE LAWS OF THE STATE OF CALIFORNIA AND OF THE
UNITED STATES OF AMERICA SHALL GOVERN THIS AGREEMENT.

IMPORTANT NOTICE TO CUSTOMERS WHO CONTACT BANK BY PHONE. TO INSURE THAT
CUSTOMER'S INQUIRIES ARE HANDLED PROMPTLY, COURTEOUSLY AND ACCURATELY, SOME OF
THE TELEPHONE CALLS BETWEEN BANK EMPLOYEES AND CUSTOMERS MAY BE MONITORED,
WITHOUT NOTICE TO SUCH CUSTOMER OR BANK EMPLOYEES, BY BANK'S SUPERVISORY OR
MANAGEMENT PERSONNEL.

TTY/TDD SERVICE. FOR TTY/TDD SERVICE, CONTACT A TELEPHONE RELAY SERVICE
PROVIDER.

BANK ADDRESS:

o        Send payments to: Wells Fargo Bank, National Association, P.O. Box
         23003, Columbus, GA 31902-3003.

o        Send inquiries and correspondence to: Wells Fargo, Business Operations
         Support, P.O. Box 219, San Leandro, CA 94577-0219.

IF A MASTERCARD CARD IS LOST OR STOLEN. Customer agrees to notify Bank
immediately if Customer suspects or knows that a MasterCard Card is lost or
stolen by calling the toll free 24-hours a day number. Customer agrees to follow
up the telephone call with written notice of the suspected or actual loss or
theft of a MasterCard Card at the correspondence address shown in the paragraph
immediately above.

CHANGES OF ADDRESS, TELEPHONE NUMBER OR NAME. Customer agrees to notify Bank in
writing of any change of business or mailing address, telephone number, or
business name.

BILLING OPTIONS.

         INDIVIDUAL BILLING: Each Authorized User will receive and pay his or
         her own bill, and if not paid, Customer shall make such required
         payment.

         CONSOLIDATED BILLING: Company's financial manager or other designated
         representative will receive a consolidated statement for payment and
         reconciliation by Customer.

(C) 2000 Wells Fargo Bank, N.A.  All rights reserved.
Member FDIC
5220
Rev03   03/01

                                  Exhibit "E"-9
<PAGE>

                                   SCHEDULE I
                                   ----------

                       Form of Borrowing Base Certificate

                                  Schedule "I"-1
<PAGE>

BORROWING BASE CERTIFICATE                   FOR MONTH ENDED: ____________ 200_.

1. Previous Aged Trial Balance Dated:                       $__________________.

2. Additions:  Gross Invoices    ____________   Cash Sales Included $
               Credit Memos     (____________)
3. Deductions: Cash Receipts    (____________)
               Cash Discounts   (____________)
           SUBTOTAL                                 $___________

4. Journal     Refunds           ____________.
   Entries:    Misc. Debit Adj.  ____________.
               Write-Offs       (____________)
               Misc. Credit Adj.(____________)
           SUBTOTAL                                 $___________

5. Control Balance (Sum of Lines 1, 3 and 4)                       $___________.

6a.     G/L Balance    $____________.
6b.     Aging Balance  $____________.
7. Less: Ineligible Reserve per Exhibit 1                          (___________)
8. Net Eligible Accounts Receivable (Line 5 minus Line 7)          $___________.
9. Maximum Advance on Accounts Receivable % of Line 8              $___________.
10. Maximum Borrowing Base (Line 9 or Credit Line
    Limit $____________, whichever is lower)                       $___________.
11. Less: Outstanding Loan Balance as of                           (___________)
12. Availability (Overadvance) Line 10 minus Line 11               $
                                                                   =============

The above accounts and inventory are assigned to WELLS FARGO BANK, NATIONAL
ASSOCIATION and a security interest granted in accordance with the terms and
conditions of the existing Amended and Restated Security Agreement between
undersigned and WELLS FARGO BANK, NATIONAL ASSOCIATION to which reference is
made. We hereby certify that the foregoing is true and correct in all
particulars and the accounts described above as collateral for loans represent
accounts which conform to all representations and warranties set forth in said
Agreement.

                                          ACCEPTED:
COMPANY: ____________________________     Wells Fargo Bank, National Association
Authorized Signature/Title:               Received By:

_____________________________________
Date: ________________                    Date: ___________________

Attached hereto are true and correct copies of each of the following:

a. Detailed agings of accounts receivable and accounts payable.
b. Exhibit 1 - calculation and description of ineligible accounts.
c. A reconciliation of Control Balance (Line 5) to GL (Line 6) and A/R aging
   (line 6), if difference exists.

COMPANY NAME:__________________________________________________________________.

                                  Schedule "I"-2
<PAGE>

Exhibit 1 to Borrowing Base Certificate for the Month ended ____________ ,200_.

Ineligible Accounts Receivable:

Invoices over 60 days past due                           $______________

Invoices over 90 days from invoice date                  _______________

20% Excessive Delinquency                                _______________

Credits Over 90 Days                                     _______________

     ARTICLE VIII CONCENTRATIONS OVER 25% OF TOTAL A/R
     -------------------------------------------------
                                                         _______________

Government (Federal, State, Municipal)                   _______________

Foreign                                                  _______________

Affiliates                                               _______________

Contras                                                  _______________

Others:________________________________.                 _______________

Others:________________________________.                 _______________

Others:________________________________.                 _______________

TOTAL INELIGIBLE A/R  (Transfer to Line 7 of Certificate)        $______________

                                 Schedule "I"-3
<PAGE>

                                 SCHEDULE 3.1(e)

                               Schedule 3.1(e)-1
<PAGE>

                                  SCHEDULE 5.3
                                  ------------

                               Other Indebtedness

         That certain Promissory Note dated as of June 27, 2003, in the original
principal amount of $4,818,000.00 executed by Borrower payable to the order of
MILLC, together with all renewals, extensions, rearrangements, amendments,
modifications, and/or increases thereto.

                                 Schedule 5.3-1

<PAGE>

                                  SCHEDULE 5.13
                                  -------------

                                      Liens

NONE

                                 Schedule 5.3-2

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