Document:

11 March 1998

                             Pre-Contract Agreement
                             ----------------------

Nu-Tec.,  L.T.D.  of Boulder  Colorado and Ebco  Technologies of Richmond Canada
intend to enter into a  contract  for the  supply of TR30  cyclotron  Systems to
Nu-Tec in the calendar year 1998.

The purpose of this Pre-Contract  Agreement is to assure that timely information
about concepts and designs are transferred and that appropriate materials can be
ordered in a timely fashion.

Nu-Tec.,  L.T.D.  and Ebco agree to work together on a sole and exclusive  basis
for the supply of 30 MeV  cyclotrons,  beam lines and related  equipment for the
proposed Nu-Tec cyclotron radioisotope production facility

Nu-Tec.,  L.T.D.  and Ebco agree to share  conceptual  designs for the  proposed
Nu-Tec Cyclotron Radioisotope Production Facility.

Nu-Tec.,  L.T.D.  intends to purchase  the magnet steel and main magnet coils at
its earliest convenience prior to a full contract to ensure an rapid delivery of
the TR3O cyclotron.  In return,  Ebco  Technologies  shall share facility design
information  at an  agreed  to  charge  out  rate  that  will  form  part of the
consulting  services of the contract for the TR30. The complete contract will be
negotiated and signed before full manufacture of the system components begin.

The  recipients  of  information   shared  under  this   precontract   agreement
acknowledge  and  agree  that  such  information  is  of a  confidential  nature
proprietary to both parties and shall not be used,  disclosed and/or  duplicated
except in accordance with the express written  authorization  of both parties to
this agreement

Signed:

/s/ RR Johnson                      /s/ Malcolm H. Benedict
-----------------------------       ---------------------------
RR Johnson, Programme Manager       Malcolm Benedict, President
Ebco Technologies                   Nu-Tec, L.T.D.CONTRACT TO BUY AND SELL REAL ESTATE
                                  (COMMERCIAL)

1. AGREEMENT.  Buyer agrees to buy and the undersigned Seller agrees to sell the
Property defined below on the terms and conditions set forth in this contract.
2. DEFINED TERMS.
     a. Buyer. Buyer, M.D.T.I.  Molecular Diagnostics & Therapeutics,  Inc. will
take title to the real property  described  below as [ ] Joint Tenants [ ] Joint
Tenants [ ] Tenants In Common [X] Other
     b. Property.  The Property is the following  legally described real estate:
Lots 2 And 3, Block 4; and Lots 2 and 3, Block 5;  totaling  4.76 acres m/l plus
an additional parcel of land 80 ft. x 405 ft (32,400 sq. ft.) for a total of 5.5
acres  m/l in the  County  of in  the  Vista  Commercial  Center,  Weld  County,
Colorado, commonly known as No.(to be determined) Longmont Colorado 80504 Street
Adress:----  City----State ---- Zip---- together with the interests,  easements,
rights,  benefits,  improvements and attached fixtures  appurtenant thereto, all
interest of Seller in vacated  streets and alleys  adjacent  thereto,  except as
herein excluded.
     c. Dates and Deadlines.
Item No. Reference         Event                               Date or Deadline
--------------------------------------------------------------------------------
1        ss.5a        Loan Application Deadline                n/a
2        ss.5b        Loan Commitment Deadline                 n/a
3        ss.5c        Buyer's Credit Information Deadline      n/a
4        ss.5c        Disapproval of Buyer's Credit Deadline   n/a
5        ss.5d        Existing Loan Documents Deadline         n/a
6        ss.5d        Objection to Existing on a Deadline      n/a
7        ss.5d        Approval of Loan Transfer Deadline       n/a
8        ss.6a        Appraisal Deadline                       June 15, 2000
9        ss.7a        Title Dealing                            June 15, 2000
10       ss.7a        Survey Deadline                          June 15, 2000
11       ss.7b        Document Request Deadline                June 20, 2000
12       ss.8a        Title Objection Deadline                 June 20, 2000
13       ss.8b        Off Record Matters Deadline              June 15, 2000
14       ss.8b        Off Record Matters objection Deadline    June 20, 2000
15       ss.10        Seller's Property Disclosure Deadline    June 15, 2000
16       ss.10a       Inspection Objection Deadline            June 22, 2000
17       ss.10b       Resolution Deadline                      June 30, 2000
18       ss.11        Closing Date                             July 17, 2000
19       ss.16        Possession Date                          delivery of deed
20       ss.16        Possession Time                          hour of closing
21       ss.28        Acceptance Deadline Date                 March 17, 2000
22       ss.28        Acceptance Deadline Time                 12:00 noon

     d. Attachments. The following exhibits,  attachments and addenda are a part
of this contract: Common Interest Community Addendum.
     e. Applicability of Terms. A check or similar mark in a box means that such
provision is applicable. The abbreviation "N/A" means not applicable.
3. INCLUSIONS AND EXCLUSIONS.
     a. The  Purchase  Price  includes the  following  items  (inclusions);
          (1)  Fixtures.  If  attached  to the  Property  on the  date  of  this
contract,  lighting,  heating,  plumbing,   ventilating,  and  air  conditioning
fixtures, inside telephone wiring and connecting blocks/jacks,  plants, mirrors,
floor coverings, intercom systems, sprinkler systems and controls, and n/a.
          (2) Other  Inclusions.  If on the Property  whether attached or not on
the date of this contract;  storm windows, storm doors, window and porch shades,
awnings, blinds, screens, window coverings,  curtain rods, drapery rods, storage
sheds,  and all keys.  Check box if  included:  [ ]  Smoke/Fire  Detectors,  [ ]
Security Systems(s); and n/a.
          (3) Trade Fixtures.  With respect to trade fixtures,  Seller and buyer
agree as follows: n/a
     b.  Instruments  of Transfer.  The Inclusions are to be conveyed at Closing
free and clear of all taxes, liens and encumbrances, except as provided inss.12.
Conveyance shall be by bill of sale or other applicable legal instrument(s).

     c. Exclusions. The following attached fixtures are excluded from this sale:
n/a

CBS 2-9-99 Contract to Buy and Sell Real Estate (Commercial - New Loan)
Buyer Initials: MHB        Seller Initials: LED NRS  Page 1 of 5
<PAGE>

4. PURCHASE PRICE AND TERMS. The Purchase price set forth below shall be payable
in U.S. Dollars by Buyer as follows: Price is calculated @ $5.00 per sq. ft. for
239,746 square feet of land.
<TABLE>
<CAPTION>

<S>     <C>            <C>                           <C>              <C>
Item No. Reference      Item                               Amount          Amount
1        ss.4           Purchase Price                 $1,198,730.00
2        ss.4a          Earnest Money                                    $*114,750.00      see Add. Prov.g
3        ss.4b          New Loan
4        ss.4c          Assumption Balance
5        ss.4d          Seller or Private Financing
6        ss.4e          Cash at Closing                                  1,083,980.00
7                       TOTAL                          $1,198,730.00    $1,198,730.00
</TABLE>
     a. Earnest Money. The Earnest Money set forth in this Section,  in the form
of 102,000  shares of stock in part payment of the  Purchase  Price and shall be
payable to and held by Dyer Realty, Inc. in its trust account, on behalf of both
Seller and Buyer. The parties authorize delivery of the Earnest Money deposit to
the Closing Company, if any, at or before Closing. *M.D.T.I.  corporate stock to
be issued in name of Seller.
     b. New Loan. Buyer shall obtain a new loan set forth in this Section and as
follows:  [ ]  Conventional  [ ] Other  n/a.  This loan will be secured by a n/a
(1st, 2nd, etc.) deed of trust.
     The loan total loan amount not in excess of $___ shall be amortized  over a
period of n/a years at  approximately  $n/a per month  including  principal  and
interest  not to exceed n/a% per annum,  plus,  if required by Buyer's  lender a
monthly  deposit of 1/12 of the estimated  annual real estate taxes and property
insurance  premium.  If the loan is an  adjustable  interest  rate or  graduated
payment loan, the monthly  payments and interest rate initially shall not exceed
the figures set forth above.
     Loan discount points,  if any, shall be paid to lender at Closing and shall
not exceed one % of the total loan amount.  Notwithstanding  the loan's interest
rate,  the  first  one  loan   discount  points  shall  be paid by Buyer and the
balance, if any, shall be paid by Buyer.
     Buyer shall timely pay Buyer's loan costs and a loan origination fee not to
exceed one % of loan amount.
     c. Assumption. (Omitted as inapplicable.)
     d. Seller or Private Financing. (Omitted as inapplicable.)
     e. Cash at Closing.  All amounts paid by Buyer at Closing including Cash at
Closing,  plus  Buyer's  closing  cost,  shall be in funds which comply with all
applicable  Colorado  laws,  which  include  cash,  electronic  transfer  funds,
certified  check,  savings and loan  teller's  check and  cashier's  check (Good
Funds).
5. FINANCING CONDITIONS AND OBLICATIONS.
     a. Loan Applications.  If Buyer is to pay all or part of the Purchase Price
obtaining an new loan,  or if an existing loan is not to be released at Closing,
Buyer,  if required  by such  lender,  shall make  written  application  by Loan
Application  Deadline (Sec.2c).  Buyer shall cooperate with Seller and lender to
obtain loan approval,  diligently and timely pursue same in good faith,  execute
all documents and furnish all information and documents required by lender, and,
subject to Sec.4,  timely pay the cost of obtaining such loan or lender consent.
Buyer agrees to satisfy the  reasonable  requirements  of lender,  and shall not
withdraw the loan or assumption application,  nor intentionally cause any change
in circumstances which would prejudice lender's approval of the loan application
or funding of the loan.
     b. Loan Commitment. If buyer is to pay all or part of the Purchase Price by
obtaining a new loan as specified in Sec.4b,  this contract is conditional  upon
Buyer obtaining a written loan commitment including,  If required by lender, (1)
lender   verification   of   employment,   (2)   lender   approval   of  Buyer's
credit-worthiness,  (3) lender  verification  that Buyer has sufficient funds to
close,  and 94)  specification  of any remaining  requirements  for funding said
loan.  This condition  shall be deemed waived unless Seller receives from Buyer,
no later  than Loan  Commitment  Deadline  (Sec.2c),  written  notice of Buyer's
inability  to obtain such loan  commitment.  If Buyer so notifies  Seller,  this
contract  shall  terminate.  IF BUYER WAIVES THIS  CONDITION BUT DOES NOT CLOSE,
BUYER SHALL BE IN DEFAULT.
     c. Credit information. (Omitted as inapplicable.)
     d. Existing Loan Review. (Omitted as inapplicable.)
6. APPRAISAL PROVISIONS.
     a. Appraisal  Condition.  This subsection a. [x] Shall [ ] Shall Not apply.
Buyer shall have the sole option and election to terminate  this contract if the
Purchase  Price  exceeds the  Property's  valuation  determined  by an appraiser
engaged by Buyer or Buyer's lender. The contract shall terminate by Buyer giving
Seller  written  notice of  termination  and either a copy of such  appraisal or
written notice from lender which confirms the Property's  valuation is less than
the Purchase Price,  received on or before the Appraisal Deadline  (Sec.2c).  If
Seller does not receive  such  written  notice of  termination  on or before the
Appraisal  Deadline  (Sec.2c).  Buyer waives any right to  terminate  under this
subsection.
         b. Cost of Appraisal. Cost of any appraisal to be obtained after the
date of this contract shall be timely paid By [x] Buyer [ ] Seller.
<PAGE>

7. EVIDENCE OF TITLE.
     a. Evidence of Title; Survey. On or before Title Deadline (Sec.2c),  Seller
shall cause to be furnished to Buyer, at Seller's expense,  a current commitment
for owner's title  insurance  policy in an amount equal to the Purchase Price or
if this box is checked, [ ] An Abstract of title certified to a current date. If
a title insurance commitment is furnished,  it [x] Shall [ ] Shall Not commit to
delete or insure over the standard exceptions which relate to
(1)      parties in possession,
(2)      unrecorded easements,
(3)      survey matters,
(4)      any unrecorded mechanics' liens,
(5)      gap period (effective date of commitment to date deed is recorded), and
(6)      unpaid taxes, assessments and unredeemed tax sales prior to the year of
         Closing.

Any additional premium expense to obtain this additional  coverage shall be paid
by [x] Buyer [ ] Seller. An amount not to exceed $_____ to be determined for the
cost of any  improvement  location  certificate  or survey  shall be paid by [ ]
Buyer [x] Seller.  If the cost exceeds this amount,  Seller shall pay the excess
on or before Closing.  The improvement  location  certificate or survey shall be
received by Buyer on or before Survey Deadline (Sec.2c).  Seller shall cause the
title  insurance  policy to be delivered to Buyer as soon as  practicable  at or
after Closing.
     b. Copies of Exceptions.  On of before Title Deadline (Sec.2c),  Seller, at
Seller's expense, shall furnish to Buyer, (1) a copy of any plats, declarations,
covenants,  conditions  and  restrictions  burdening the Property,  and (2) if a
title  insurance  commitment  is  required to be  furnished,  and if this box is
checked [x] Copies of any Other  Documents  listed in the schedule of exceptions
(Exceptions).  Even if the box is not checked,  Seller shall have the obligation
to furnish these documents pursuant to this subsection of requested by Buyer any
time on or before the Document  Requested  Deadline  (Sec.2c).  This requirement
shall  pertain  only to  documents as shown of record in the office of the clerk
and recorder(s).  The abstract or title insurance commitment,  together with any
copies or  summaries  of such  documents  furnished  pursuant  to this  Section,
constitute the title documents (Title Documents).
8. TITLE.
     a. Title Review. Buyer shall have the right to inspect the Title Documents.

CBS 2-9-99 Contract to Buy and Sell Real Estate (Commercial - New Loan)
Buyer Initials: MHB        Seller Initials: LED NRS  Page 2 of 5
<PAGE>
Written  notice  by  Buyer  of  unmerchantability  of  title  or  of  any  other
unsatisfactory  title  condition shown by the Title Documents shall be signed by
or on behalf of Buyer and given to Seller on or before Title Objection  Deadline
(Sec.2c),  or with five (5)  calendar  days after  receipt by Buyer of any Title
Document(s) or  endorsement(s)  adding new  Exception(s) to the title commitment
together with a copy of the Title Document adding new  Exception(s) to title. If
Seller does not receive  Buyer's notice by the date(s)  specified  above,  Buyer
accepts  the  condition  of  title  as  disclosed  by  the  Title  Documents  as
satisfactory.
     b. Matters not Shown by the Public Records.  Seller shall deliver to Buyer,
on or before  Off-Record  Matters Deadline  (Sec.2c) true copies of all lease(s)
and  survey(s)  in Seller's  possession  pertaining  to the  Property  and shall
disclose to Buyer all  easements,  liens or other title matters not shown by the
public records of which Seller has actual Knowledge.  Buyer shall have the right
to inspect the Property to determine  if any third  party(ies)  has any right in
the Property not shown by the public  records (such as an  unrecorded  easement,
unrecorded  lease,  or  boundary  line  discrepancy).   Written  notice  of  any
unsatisfactory  condition(s)  disclosed by Seller or revealed by such inspection
shall be signed by or on behalf Buyer and give to Seller on or before Off-Record
Matters Objection Deadline  (Sec.2c).  If Seller does not receive Buyer's notice
by said date,  Buyer  accepts  title  subject to such  rights,  if any, of third
parties of which Buyer has actual Knowledge.
     c. Special Taxing  Districts.  SPECIAL  TAXING  DISTRICTS MAY BE SUBJECT TO
GENERAL  OBLICATION  INDEBTEDNESS  THAT IS PAID BY REVENUES PRODUCED FROM ANNUAL
TAX LEVIES ON THE TAXABLE  PROPERTY  WITHIN SUCH  DISTRICTS.  PROPERTY OWNERS IN
SUCH DISTRICTS MAY BE PLACED AT RISK FOR INCREASED MILL LEVIES AND EXCESSIVE TAX
BURDENS  TO  SUPPORT  THE  SERVICING  OF SUCH  DEBT  WHERE  CIRCUMSTANCES  ARISE
RESULTING IN THE  INABILITY OF SUCH A DISTRICT TO  DISCHARGE  SUCH  INDEBTEDNESS
WITHOUT  SUCH AN INCREASE IN MILL  LEVIES.  BUYER  SHOULD  INVESTIGATE  THE DEBT
FINANCING REQUIREMENTS OF THE AUTHORIZED GENERAL OBLIGATION INDEBTEDNESS OF SUCH
DISTRICT, EXISTING MILL LEVIES OF SUCH DISTRICT SERVICING SUCH INDEBTEDNESS, AND
THE POTENTIAL FOR AN INCREASE IN SUCH MILL LEVIES.
     In the event the Property is located within a special  taxing  district and
Buyer  desires to  terminate  this  contract as a result,  if written  notice is
received by Seller on or before Off-Record  Matters Objection Deadline (Sec.2c),
this contract shall then terminate. If Seller does not receive Buyer's notice by
such date, Buyer accepts the effect of the Property's  inclusion in such special
taxing district(s) and waives the right to so terminate.
     d.   Right of Cure.  If  Seller  receives  notice of  unmerchantability  of
title or any other  unsatisfactory  title  condition(s)  or commitment  terms as
provided in Sec.8a or b above,  Seller  shall use  reasonable  effort to correct
said items and bear any nominal expense to correct the same prior to Closing. If
such  unsatisfactory  title condition(s) are not corrected on or before Closing,
this contract shall then  terminate;  provided,  however,  Buyer may, by written
notice received by Seller, on or before Closing, waive objection to such items.
     e. Title Advisory.  The Title Documents affect the title, ownership and use
of the Property and should be reviewed  carefully.  Additionally,  other matters
not reflected on the Title Documents may affect the title,  ownership and use of
the Property,  including without  limitation  boundary lines and  encroachments,
area,  zoning,  unrecorded  easements and claims of easements,  leases and other
unrecorded agreements, and various laws and governmental regulation s concerning
land use, development and environmental matters. The surface estate may be owned
separately  from the  underlying  mineral  estate,  and  transfer of the surface
estate  does not  necessarily  include  transfer of the  mineral  rights.  Third
parties may hold  interests in oil,  gas other  minerals,  geothermal  energy or
water on or under the  Property,  which  interests may give them rights to enter
and use the  Property.  Such  matters may be excluded  from the title  insurance
policy.  Buyer is advised to timely  consult  legal  counsel with respect to all
such matters as there are strict time limits  provided in this  contract  (e.g.,
Title Objection  Deadline (Sec.2c)) and Off-Record  Matters  Objection  Deadline
(Sec.2c).
9.LEAD BASED PAINT.  Unless exempt,  if the improvements on the Property include
one or more residential dwelling(s) for which a building permit was issued prior
to January 1, 1978,  this contract  shall be void unless a completed  Lead-Based
Paint  Disclosure  (Sales) form is signed by Seller and the required real estate
licensee(s), which must occur prior to the parties signing this contract.
10.  PROPERTY  DISCLOSURE  AND  INSPECTION.   On  or  before  Seller's  Property
Disclosure  Deadline  (Sec.2c),  Seller  agrees to provide  Buyer with a written
disclosure of adverse matters regarding the Property  completed by Seller to the
best of Seller's current actual knowledge.
     a.  Inspection  Objection  Deadline.  Buyer  shall  have the  right to have
inspection(s)  of the physical  condition of the  Property  and  Inclusions,  at
Buyer's  expense.  If the physical  condition of the Property or  Inclusions  is
unsatisfactory  in  buyer's  subjective  discretion,  Buyer  shall on or  before
Inspection Objection Deadline (Sec.2c):
     (1)  notify Seller in writing that this contract is terminated, or
     (2)  provide  Seller  with a  written  description  of  any  unsatisfactory
          physical  condition  which buyer requires Seller to correct (Notice to
          Correct).
If written  notice is not received by Seller on or before  Inspection  Objection
Deadline  (Sec.2c),  the physical condition of the Property and Inclusions shall
be deemed to be satisfactory to Buyer.
     b. Resolution  Deadline.  If Notice to Correct is received by Seller and if
Buyer and Seller, have note agreed in writing to settlement thereof on or before
Resolution  Deadline  (Sec.2c),  this contract shall  terminate one calendar day
following  the  Resolution  Deadline,  unless  before  such  termination  Seller
receives Buyer's written withdrawal of the Notice to Correct.
<PAGE>

     c.  Damage;  Liens;  Indemnity.  Buyer is  responsible  for payment for all
inspections,  surveys,  engineering  reports  or for any the work  performed  at
Buyer's  request and shall pay for any damage  which  occurs to the Property and
Inclusions  as a result of such  activities.  Buyer  shall not permit  claims or
liens of an kind  against the  Property for  inspections,  surveys,  engineering
reports and for any other work  performed  on the  Property at Buyer's  request.
Buyer agrees to indemnify, protect and hold Seller harmless from and against any
liability,  damage,  cost or expense  incurred by Seller in connection  with any
such  inspection,  claim,  or lien.  This indemnity  includes  Seller's right to
recover all costs and expenses  incurred by Seller to enforce  this  subsection,
including  Seller's  reasonable  attorney fees. The provision of this subsection
shall survive the termination of this contract.
11.  CLOSING.  Delivery  of  deed(s)  from  Seller to buyer  shall be at Closing
(Closing).  Closing shall be on the date  specified as the Closing Date (Sec.2c)
or by mutual  agreement at an earlier date.  The hour and place of Closing shall
be as designated by Dyer Realty, Inc. as mutually agreed by the parties.
12. TRANFER OF TITLE. Subject to tender or payment at Closing as required herein
and compliance by Buyer with the other terms and provisions hereof, Seller shall
execute and deliver a good and  sufficient  Genera  Warranty  Deed to Buyer,  at
Closing,  conveying  the Property free and clear of all taxes except the general
taxes  for the year of  Closing.  Except  as  provided  herein,  title  shall be
conveyed  free and clear of all  liens,  including  any  governmental  liens for
special  improvements  installed  as of the  date of  Buyer's  signature  heron,
whether assessed or not. Tittle shall be conveyed subject to:
     a. those specific  Exceptions  described by reference to recorded documents
as reflected in the Title Documents  accepted by Buyer in accordance with Sec.8a
[Title Review],
     b. Distribution utility easements,
     c. those  specifically  described  rights of third parties not shown by the
public  records of which buyer has actual  knowledge  and which were accepted by
Buyer in accordance with Sec.8b [Matters Not Shown by the Public Records], and
     d. inclusion of the Property within any special taxing district, and
     e. the benefits and burdens of any declaration  and party wall  agreements,
if any, and
     f. other
13. PAYMENT OF ENCUMBRANCES.  Any encumbrance  required to be paid shall be paid
at or before  Closing  from the proceeds of this  transaction  or from any other
source.
14. CLOSING COSTS;  DOCUMENTS AND SERVICES.  Buyer and Seller shall pay, in Good
Funds, their respective Closing costs and all other items required to be paid at
Closing,  except as otherwise  provided herein.  Buyer and Seller shall sign and
complete all customary or reasonably  required  documents at or before  Closing.
Fees for real estate  Closing  services shall be paid at Closing by [x] One-Half
by Buyer and One-Half by Seller [ ] Buyer [ ] Seller [ ] Other.

CBS 2-9-99 Contract to Buy and Sell Real Estate (Commercial - New Loan)
Buyer Initials: MHB        Seller Initials: LED NRS  Page 3 of 5
<PAGE>
The local  transfer tax of  _________%  of the  Purchase  Price shall be paid at
Closing by [ ] Buyer [ ] Seller.  Any sales and use tax that may accrue  because
of this  transaction  shall  be paid  when  due by [ ]  Buyer  [ ]  Seller.
15.PRORATIONS.  The  following  shall be  prorated  to Closing  Date,  except as
otherwise provided:
     a. Taxes.  Personal  property  taxes, if any, and general real estate taxes
for  the  year  of  Closing,  based  on [ ] The  Taxes  for  the  Calendar  Year
Immediately  Preceding  Closing  [x] the Most  Recent  Mill Levy and Most Recent
Assessment [ ] Other
     b. Rents. Rents based on [ ] Rents Actually Received [ ] Accrued.  Security
deposits  held by Seller  shall be credited to Buyer.  Seller  shall  assign all
leases to Buyer and Buyer shall assume such lease.
     c. Other  Prorations.  Water,  sewer  charges;  and interest on  continuing
loan(s), if any, and Association fees and any other assessments.
     d. Final Settlement.  Unless otherwise agreed in writing,  these prorations
shall be final.
16.POSSESSION.  Possession  of the  Property  shall  be  delivered  to  Buyer on
Possession Date and Possession Time (Sec.2c),  subject to the following lease(s)
or tenancy(s):  none
If Seller, after Closing, fails to deliver possession as specified, Seller shall
be subject to eviction and shall be additionally  liable to Buyer for payment of
$75.00 per day from the Possession Date (Sec.2c) until possession is delivered.
17. NOT  ASSIGNABLE.  This  contract  shall not be  assignable  by Buyer without
Seller's prior written  consent.  Except as so  restricted,  this contract shall
inure to the benefit of and be binding upon the heirs, personal representatives,
successors and assigns of the parties.
18.  CONDITION  OF, AND DAMAGE TO PROPERTY AND  INCLUSIONS.  Except as otherwise
provided in this contract, the Property, inclusion or both shall be delivered in
the condition  existing as of the date of this contract,  ordinary wear and tear
excepted.
     a. Casualty;  Insurance.  In the event the Property or Inclusions  shall be
damaged by fire or the casualty prior to Closing,  in an amount of not more than
ten percent of the total Purchase Price, Seller shall be obligated to repair the
same before the Closing Date (Sec.2c).  In the event such damage is not repaired
within  said time or if the  damages  exceed  such  sum,  this  contract  may be
terminated  at the option of Buyer by  delivering  to Seller  written  notice of
termination.  Should Buyer elect to carry out this contract despite such damage,
Buyer shall be entitled to a credit, at Closing,  for all the insurance proceeds
resulting from such damage to the Property and Inclusions  payable to Seller but
not the owner's association,  if any, plus the amount of any deductible provided
for in such  insurance  policy,  such  credit not to exceed  the total  Purchase
Price.
     b. Damage;  Inclusions;  Services.  Should any  Inclusion(s)  or service(s)
(including systems and components of the Property, e.g. heating, plumbing, etc.)
fail or be damaged  between the date of this contract and Closing or possession,
whichever  shall be  earlier,  then  Seller  shall be liable  for the  repair or
replacement of such  Inclusion(s) or service(s) with a unit of similar size, age
and  quality,  or an  equivalent  credit,  but  only  to  the  extent  that  the
maintenance or replacement of such  Inclusion(s)  or service(s) or fixture(s) is
not the  responsibility of the owner's  association,  if any, less any insurance
proceeds received by Buyer covering such repair or replacement.
     c. Walk-Through:  Verification of Condition. Buyer, upon reasonable notice,
shall have the right to walk  through  the  Property  prior to Closing to verify
that the physical  condition of the Property and  Inclusions  complies with this
contract.
19. RECOMMENDATION OF LEGAL AND TAX COUNSEL. By signing this document, Buyer and
Seller  acknowledge  that the Selling Company or the Listing Company has advised
that this document has important  legal  consequences  and has  recommended  the
examination of title and consultation with legal and tax or other counsel before
signing this contract.
20. TIME OF ESSENCE AND REMEDIES.  Time is of the essence hereof. If any note or
check received as Earnest Money  hereunder or any other payment due hereunder is
not paid, honored or tendered when due, or if any other obligation  hereunder is
not  performed  or waived  as  herein  provided,  there  shall be the  following
remedies:
     a. If Buyer Is in Default:
[ ] (1)  Specific  Performance.  Seller  may  elect to treat  this  contract  as
canceled,  in which case all  payments  and things of value  received  hereunder
shall be forfeited and retained on behalf of Seller, and Seller may recover such
damages as may be proper, or Seller may elect to treat this contract as being in
full force and effect and Seller shall have the right to specific performance or
damages, or both.
[X] (2) Liquidated Damages.  All payments and things of value received hereunder
shall be  forfeited  by Buyer and  retained on behalf of Seller and both parties
shall thereafter be released from all obligations  hereunder.  It is agreed that
such payments and things of value are LIQUIDATED DAMAGES and (except as provided
in  subsection  c) are  SELLER'S  SOLE AND ONLY  REMEDY for  Buyer's  failure to
perform the obligations of this contract.  Seller  expressly waives the remedies
of specific performance and additional damages,
     b. If Seller Is In  Default:  Buyer may  elect to treat  this  contract  as
canceled,  in which case all  payments  and things of value  received  hereunder
shall be returned and Buyer may recover such damages as may be proper,  or Buyer
may elect to treat  this  contract  as being in full  force and effect and Buyer
shall have the right to specific performance or damages, or both.
     c.  Costs and  Expenses.  In the  event of any  arbitration  or  litigation
relating to this contract, the arbitrator or court shall award to the prevailing
party all reasonable costs and expenses, including attorney fees.

<PAGE>

21. MEDIATION. If a dispute arises relating to this contract,  prior to or after
Closing,  and is not resolved,  the parties shall first proceed in good faith to
submit the matter to mediation. Mediation is a process in which the parties meet
with an  impartial  person  who helps to  resolve  the  dispute  Informally  and
confidentially.  Mediators cannot impose binding  decisions.  The parties to the
dispute must agree before any  settlement  is binding.  The parties will jointly
appoint  an  acceptable  mediator  and will  share  equally  In the cost of such
mediation. The mediation,  unless otherwise agreed, shall terminate in the event
the entire dispute Is not resolved 30 calendar days from the date written notice
requesting  mediation is sent by one party to the  other(s).  This Section shall
not alter any date In this contract, unless otherwise agreed.
22. EARNEST MONEY  DISPUTE.  Notwithstanding  any  termination of this contract,
Buyer and Seller  agree  that,  in the event of any  controversy  regarding  the
Earnest  Money and  things of value held by broker or  Closing  Company  (unless
mutual written  instructions are received by the holder of the Earnest Money and
things of value),  broker or Closing  Company  shall not be required to take any
action but may await any proceeding,  or at broker's or Closing Company's option
and sole discretion, may Interplead all parties and deposit any moneys or things
of value into a court of competent  jurisdiction  and shall  recover court costs
and reasonable attorney fees.
23.  TERMINATION.  In the event this  contract is  terminated,  all payments and
things of value  received  hereunder  shall be returned and the parties shall be
relieved of all obligations hereunder, subject toss.ss.10c, 21 and 22.
24. ADDITIONAL PROVISIONS.  (The language of these additional provisions has not
been approved by the Colorado Real Estate Commission.)
     a. Contract shall be subject to approval of Seller's  Replat by Weld County
Planning and Weld County Commissioners.
     b.  Contract  shall be subject to  installation,  by Seller,  of  utilities
including electrical,  water, and sewer, and necessary  requirements of roads by
Weld County.
     c.  Seller and Buyer agree that Buyer may  purchase  one or more water taps
from Horizon  Investments LLC at the current price, at the time of purchase,  as
determined by Left Hand Water District.

--------------------------------------------------------------------------------
CBS 2-9-99 Contract to Buy and Sell Real Estate (Commercial  New Loan)
Buyer initials  MHB          Seller Initials NRS  LED           Page 4 of 5
<PAGE>

                       ADDITIONAL PROVISIONS (continued)

24. ADDITIONAL PROVISIONS (continued).

(The  language  of these  additional  provisions  has not been  approved  by the
Colorado Real Estate Commission.)

     Concerning  the  Property  know as: Lots 2 and 3, Block 4 and Lots 2 and 3,
     Block 5; plus an additional parcel totaling 5.5 acres m/l, Vista Commercial
     Center, Weld County, Colo.

     d. It is hereby  mutually  understood and agreed that no outside storage is
allowed,  except that  meeting  the  requirements  for  adequate  screening,  as
described in  Paragraph  10.03 of the recorded  Covenants  for Vista  Commercial
Center, and with written approval by the Architectural  Control  Committee.  The
ACC of Vista  Commercial  Center  will  review  plans for such use and  render a
decision within seven days of submittal by Buyer. Buyer's obligation to purchase
the Property is  conditioned on the ACC approving in writing,  Buyer's  building
plans, including the outside storage plans on or before June 15, 2000.

     e.  Contract  is  subject to all mylars of Replat  being  recorded  in Weld
County.

     f.  Covenants  of Vista  Commercial  Center,  Phase I,  shall be amended to
include Replat of property  described,  in this contract,  on or before June 15,
2000.

     g.  Buyer's  obligation  to  purchase  the  Property  is  subject  to Buyer
receiving  approval from Weld County for Buyer's Site Plan and building plans on
or before June 22, 2000. In the event Buyer has not received  such  approvals by
June 23, 2000,  Buyer may elect to  terminate  this  Contract by giving  written
notice to Seller of the failure of the  condition or in the  alternative,  Buyer
may elect to waive this  condition.  If Buyer fails to deliver written notice of
termination  by June 23,  2000,  this  condition  shall be deemed  waived.  Upon
receipt of approval by Weld County and the Architectural.  Control Committee for
(i) Seller's  replat of the Property,  (ii) Buyer's Site Plan, and (iii) Buyer's
building  plans,  the amount of  $20,000.00  in cash,  or $20,000.00 of the MDTI
stock held as Earnest Money Deposit,  at its then current market value, shall be
deemed to be  non-refundable  earnest  money,  except  for  Seller's  default in
performing  the  Contract.  In lieu of a portion  the MDTI stock  serving as the
non-refundable  portion of the  earnest  money  deposit,  Seller  shall have the
Option to elect to have buyer deposit the sum of $20,000.00 in cash or certified
funds with Dyer Realty,  Inc. on or before July 10, 2000, and if such deposit is
made, such $20,000.00 deposit shall constitute the non-refundable  earnest money
deposit. If Seller elects to have Buyer deposit the $20,000.00 cash, Seller will
notify Buyer in writing by no later than June 22, 2000.

     h. Seller shall deliver to Buyer as soon as reasonably possible,  but in no
event  later  than  April 1, 2000,  a copy of the  survey  and  drawings  of the
Property as proposed to be replatted,  so that Buyer may use such information in
obtaining approval of its Site Plan and, building plans.

     i. The survey  required to be provided by Seller under  Paragraph  7.a will
not be required to be an ALTA  survey.  ---------------

     j. The  purchase  price  shall be  adjusted  to reflect  the actual  square
footage  of the  Property  as shown by the  survey  to be  obtained  by  Seller,
multiplied by $5.00 per square foot.

        M.D.T.I

/s/ Malcolm H. Benedict                   03-08-00
--------------------------------------------------
Buyer   by Malcolm H. Benedict, Chairman     Date              Buyer
Date

<TABLE>
<CAPTION>

<S>                                                          <C>
        HORIZON INVESTMENTS, LLC

/s/ N. Russell Stacey                        03-08-00          /s/ Lyle E. Dehning                       03-08-00
------------------------------------------------               --------------------------------------------------
Seller  by N. Russell Stacey, Manager,                         Seller    by Lyle E. Dehning, Manager      Date
Date
================================================================================
CBS 2-9-99 Contract to Buy and Sell Real Estate (Commercial)

</TABLE>

<PAGE>

25.  ENTIRE  AGREEMENT;   SUBSEQUENT   MODIFICATION   SURVIVAL.   This  contract
constitutes  the entire  contract  between the  parties  relating to the subject
hereof, and any prior agreements  pertaining  thereto,  whether oral or written,
have been merged and integrated into this contract.  No subsequent  modification
of any or the terms of this contract  shall be valid,  binding upon the parties,
or enforceable unless made in writing and signed by the parties.  Any obligation
in this  contract  which,  by its  terms,  is  intended  to be  performed  after
termination or Closing shall survive the same.

26.  FACSIMILE.  Signatures  [X]  May [ ] May  Not be  evidenced  by  facsimile.
Documents  with  original  signatures  shall be  provided  to the other party at
Closing, or earlier upon request of any party.

27. NOTICE. Except for the notice requesting  mediation described in sec.21, any
notice to Buyer shall be effective when received by Buyer or by Selling  Company
and any notice to Seller shall be effective  when  received by Seller or Listing
Company.

28.  NOTICE OF  ACCEPTANCE;  COUNTERPARTS.  This  proposal  shall expire  unless
accepted  in writing,  by Buyer and Seller,  as  evidenced  by their  signatures
below,  and the offering party receives notice of acceptance  pursuant to sec.27
on or before Acceptance Deadline Date and Acceptance Deadline Time (sec.2c).  If
accepted, this document shall become a contract between Seller and Buyer. A copy
of this document may be executed by each party, separately,  and when each party
has executed a copy thereof,  such copies taken together shall be deemed to be a
full and complete contract between the parties.

M.D.T.I.

/s/ Malcolm H. Benedict
----------------------------------------      ----------------------------
Buyer      by Malcolm H. Benedict, Chairman   Buyer

Date of Buyer's Signature: 03-08-00           Date of Buyer's Signature:
Buyer's Address:                              Buyer's Telephone No: 303 405-6500
1660 Industrial Circle                        Buyer's Fax No:      303 465-7099
Longmont, Colorado 80501

(NOTE: If this offer Is being  countered or rejected,  do not sign this document
Refer to sec.29)

HORIZON INVESTMENTS, LLC

/s/ N. Russell Stacey                     /s/ S. J. Weddel
----------------------------              -------------------------------
Seller by N. Russell Stacey, Manager      Seller by S. J. Weddel, Manager

Date of Seller's Signature: 03-08-2000    Date of Seller's Signature: 03-08-2000
Seller's Address: 1635 Faith Place        Seller's Telephone No: 303 776-5451
Longmont, Colorado   80501                Seller's Fax No:

29. COUNTER; REJECTION. This offer is [ ] Countered [ ] Rejected.

Initials  only of party  (Buyer or  Seller)  who  countered  or  rejected  offer
________ ___________

                                 END OF CONTRACT
--------------------------------------------------------------------------------
    Note:Closing Instructions should be signed on or before Title Deadline.
--------------------------------------------------------------------------------

BROKER  ACKNOWLEDGMENTS.  The undersigned Broker(s)  acknowledges receipt of the
Earnest Money deposit specified in sec.4 and, while not a party to the contract,
agrees to cooperate upon request with any mediation conducted under sec.21.

     Selling  Company  Brokerage  Relationship.  The  Selling  Company  and  its
licensees  have been engaged in this  transaction  as [ ] Buyer Agent [ ] Seller
Agent/Subagent [ ] Dual Agent [X] Transactlon-Broker.

     Listing  Company  Brokerage  Relationship.  The  Listing  Company  and  its
licensees  have been  engaged In this  transaction  as [ ] Seller Agent [ ] Dual
Agent [X] Transaction-Broker.

BROKERS' COMPENSATION DISCLOSURE

Selling  Company's  compensation  or  commission is to be paid by: [ ] Buyer [X]
Seller [ ] Listing Company [ ] Other

(To  be  completed  by  Listing  Company)  Listing  Company's   compensation  or
commission is to be paid by [ ] Buyer [X] Seller [ ] Other:

--------------------------------------------------------------------------------
<TABLE>
<CAPTION>

<S>                                      <C>                                          <C>
Selling Company: ..                       Dyer Realty, Inc.                            (Name of Company)
By: /s/ Marvin L. Dyer                    03-[ ]-2000
Signature Marvin L. Dyer                  Date
Selling Company Address:  520 Main Street, Suite A            Selling Company Telephone No: 303 772-3200
                    Longmont, Colorado 80501                  Selling Company Fax No:  303 651-1320

Listing Company:                           Dyer Realty, Inc.                           (Name of Company)
By: /s/ Marvin L. Dyer                     03-[ ]-2000
Signature       Marvin L. Dyer             Date
Listing Company Address:  520 Main Street, Suite A            Listing Company Telephone No: 303 772-3200
                    Longmont, Colorado 80501                  Listing Company Fax No:  303 651-1320
</TABLE>

================================================================================
CBS 2-9-99 Contract to Buy and Sell Real Estate (Commercial)
Buyer initials  MHB          Seller Initials NRS  LED           Page 5 of 5

<PAGE>

                            The printed portions of this form have been approved
                           By the Colorado Real Estate Commission. (CIC 32-9-99)
                                      THIS FORM HAS IMPORTANT LEGAL CONSEQUENCES
                                    AND THE PARTIES SHOULD CONSULT LEGAL AND TAX
                                                OR OTHER COUNSEL BEFORE SIGNING.

                       COMMON INTEREST COMMUNITY ADDENDUM
                    TO CONTRACT TO BUY AND SELL REAL ESTATE
                   (COMMERCIAL or VACANT LAND - FARM - RANCH)

     (This addendum should be used for the sale of Property involving  ownership
of common  elements,  or where  there is an  obligation  to pay common  expenses
pursuant to a recorded Declaration)

AMENDMENT TO A CONTRACT TO BUY AND SELL REAL ESTATE

     This Common Interest  Community  Addendum is made a part of the Contract to
Buy and Sell Real Estate for the purchase and sale of the Property known as Lots
2 and 3, Block 4 and Lots 2 and 3,  Block 5, plus an  additional  32,400  sq.ft.
parcel in Vista  Commercial  Center,  which is dated March 8, 2000 between Buyer
and  Seller  ("Contract").  This  Addendum  shall  control  in the  event of any
conflict with the Contract. The following provisions of the Contract are amended
by these additions:

     Sec.3. INCLUSIONS AND EXCLUSIONS. The purchase price shall also include use
of  the  following  parking  facility(ies):   n/a;  and  the  following  storage
facility(ies): n/a

     Sec. 7c. COMMON INTEREST COMMUNITY GOVERNING DOCUMENTS.

(Check only one box)

[  ] (1) Not Applicable. This subsection c. shall not apply.

[X]  (2)  Conditional Of Buyer's  Review.  Seller shall cause to be furnished to
     Buyer, at Seller's expense, on or before Title Deadline (Sec. 2c) a current
     copy  of  the  owner's   association   declarations,   bylaws,   rules  and
     regulations,   party  wall  agreements  (herein   collectively   "Governing
     Documents"),  most  recent  financial  documents  consisting  of (a) annual
     balance sheet, (b) annual income and expenditures statement, and (c) annual
     budget (herein collectively "Financial  Documents"),  given to Seller on or
     before Governing Documents Deadline,  [which is the same as Title Objection
     Deadline (Sec.  2c)],  shall  terminate  this contract.  If Seller does not
     receive notice from Buyer within such time, Buyer accepts the terms of said
     documents,  and Buyer's right to terminate  this contract  pursuant to this
     subsection is waived, notwithstanding the provisions of Sec. 8d.

[  ] (3) Not   Conditional  On  Review.  Buyer  acknowledges   that  Seller  has
     delivered a copy of the Governing Documents and Financial Documents.  Buyer
     has  reviewed  them,  agrees  to  accept  the  benefits,   obligations  and
     restrictions  which they impose upon the Property and its owners and waives
     any right to terminate this contract due to such documents, notwithstanding
     the provisions of Sec. 8d.

     Sec. 8f. RIGHT OF FIRST REFUSAL. If the Governing Documents require written
approval of the sale  contemplated  by this  contract or waiver of any option or
right of first  refusal by the  owner's  association  or any other  owner in the
owners'  association,  Seller  shall  timely  submit this  contract  and request
approval of the sale or waiver of any option or right of first refusal  pursuant
to such provisions.  If no such approval or waiver is obtained on or before June
15, 2000, this contract shall  terminate.  Buyer agrees to cooperate with Seller
in obtaining  the approval  and/or  waiver if required by  applicable  Governing
Documents and shall make available such  information as the owners'  association
may reasonable require.

     Sec. 14.  CLOSING COSTS;  DOCUMENTS AND SERVICES.  Any fees incident to the
transfer  from Seller to Buyer  assessed  on behalf of the  owners'  association
shall be paid by [ ]Buyer [X] Seller.

     Sec. 15e.  ASSOCIATION  ASSESSMENTS.  Current regular  owners'  association
assessments  and  association  dues.  Owners'  association  assessments  paid in
advance  shall be credited to Seller at Closing.  Cash  reserves held out of the
regular owners' association  assessments for deferred maintenance by the owners'
association shall not be credited to Seller except as may be otherwise  provided
by the Governing  Documents.  Any special assessment by the owners'  association
for  improvements  that have been installed as of the date of Buyer's  signature
heron shall be the obligation of Seller. Any other special  assessment  assessed
prior  to  Closing  Date  (Sec.  2c) by the  owners'  association  shall  be the
obligation  of [X] Buyer [ ] Seller.  Seller  represents  that the amount of the
regular owners' association  assessment is currently payable at $ _______ tbd___
per ___ and that there are no unpaid regular or special  assessments against the
Property except the current regular assessments and such assessments are subject
to change as  provided in the  Governing  Documents.  Seller  agrees to promptly
request the owners'  association  to deliver to Buyer before  Closing Date (Sec.
2c) a current statement of assessments  against the Property.  Any fees incident
to the issuance of such statement of assessments  shall be paid by [ ] Buyer [X]
Seller.

M.D.T.I.
/s/ Malcolm Benedict
by Malcolm H. Benedict, Chairman
Buyer                                    Buyer
Date of Buyer's signature:               Date of Buyer's Signature:

Horizon Investments, LLC
/s/ N. Russell Stacey                    /s/ Lyle E. Dehning
by N. Russell Stacey, Manager            by Lyle E. Dehning, Manager
Seller                                   Seller
Date of Seller's signature: 03-08-2000   Date of Seller's signature: 03-08-2000
================================================================================
CIC 32-9-99  Common  Interest  Community  Addendum to Contract Buy and Sell Real
Estate  (Commercial  - Vacant  Land - Farm - Ranch)  This  form is  product  by:
Formulator for Windows 800-336-1027

<PAGE>

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