Exhibit 4.2

 Revolving Business Note
 M&I Bank

 PLASTICS MFG. COMPANY
    & TECSTAR MFG. COMPANY     JANUARY 18, 2000            $3,000,000.00
        Customer                    Date                      Amount

 The undersigned ("Customer", whether one or more) promises to pay to
 the order of M&I NORTHERN BANK ("Lender") at 3155 N. 124TH STREET,
 BROOKFIELD, WI 005, the principal sum of $ 3,000,000.00 or, if less,
 the aggregate unpaid principal amount of all loans made under this
 Note, plus interest, as set forth below.

 Lender will disburse loan proceeds to Customer's deposit account number
 ____________________ or by other means acceptable to Lender.

 Interest is payable on   FEBRUARY 1, 2000  , and on the same date of
 each   SUCCEEDING   month thereafter and at maturity.

 Principal is payable    FEBRUARY 1, 2001   .

 This Note bears interest on the unpaid principal balance before
 maturity at a rate equal to [Complete (a), (b) or (c); only one
 shall apply]:

 (a) N/A  N/A%  per year.
 (b) N/A  N/A  percentage points in excess of the prime rate of interest
               adopted by Lender as its base rate for interest rate
               determinations from time to time which may or may not be
               the lowest rate charged by Lender (with the rate changing
               as and when that prime rate changes).  The initial rate
               is  N/A%  per year.
 (c)  X  This Note bears interest on the unpaid principal balance before
         maturity (whether upon demand, acceleration or otherwise) at
         the rates set forth on Exhibit A attached hereto.

 Interest is computed on the basis of a 360-day year on the actual
 number of days principal is unpaid.  Unpaid principal and interest
 bear interest after maturity (whether by acceleration or lapse of
 time) until paid at Prime Rate plus 3%.

 If any payment is not paid when due, if a default occurs under any
 other obligation of any Customer to Lender or if Lender deems itself
 insecure, the unpaid balance shall, at the option of Lender, and
 without notice mature and become immediately payable.  The unpaid
 balance shall automatically mature and become immediately payable in
 the event any Customer, surety, or guarantor becomes the subject of
 bankruptcy or other insolvency proceedings.  Lender's receipt of any
 payment on this Note after the occurrence of an event of default shall
 not constitute a waiver of the default or Lender's rights and remedies
 upon such default.

 This Note may be prepaid in full or in part without penalty.
<PAGE>
 Lender is authorized to automatically charge payments due under this
 Note to account number     N/A     (See reverse side regarding Notice
 of Transfers Varying in Amount.)

   N/A   Check here only if this Note is to be secured by a first lien
         mortgage or equivalent security interest on a one-to-four
         family dwelling used as Customer's principal place of residence.

 This note includes additional provisions on reverse side.

 PLASTICS MFG. COMPANY &
     TECSTAR MFG. COMPANY (SEAL)        W188 N11707 MAPLE ROAD
                                               Street Address
 BY:  BRUCE SCHNEIDER     (SEAL)        GERMANTOWN, WI 53022
      Bruce Schneider, VP/Finance             City/State/Zip

                             ADDITIONAL PROVISIONS

 This Note is secured by all existing and future security agreements,
 assignments and mortgages between Lender and Customer, between Lender
 and any guarantor of this Note, and between Lender and any other person
 providing collateral security for Customer's obligations, and payment
 may be accelerated according to any of them.  Unless a lien would be
 prohibited by law or would render a nontaxable account taxable,
 Customer grants to Lender a security interest and lien in any deposit
 account Customer may at any time have with Lender.  Lender may, at any
 time after an occurrence of an event of default, without notice or
 demand, setoff against any deposit balances or other money now or
 hereafter owed any Customer by Lender any amount unpaid under this Note.

 Lender is authorized to make book entries evidencing loans and payments
 and the aggregate of all loans as evidenced by those entries is
 presumptive evidence that those amounts are outstanding and unpaid to
 Lender.  Customer covenants that all loans shall be used solely for
 business and not personal purposes.

 Customer agrees to pay all costs of administration and collection
 before and after judgment, including reasonable attorneys' fees
 (including those incurred in successful defense or settlement of any
 counterclaim brought by Customer or incident to any action or
 proceeding involving Customer brought pursuant to the United States
 Bankruptcy Code) and waives presentment, protest, demand and notice of
 dishonor.  Customer agrees to indemnify and hold harmless Lender, its
 directors, officers, employees and agents, from and against any and all
 claims, damages, judgments, penalties, and expenses, including
 reasonable attorneys' fees, arising directly or indirectly from credit
 extended under this Note or the activities of Customer.  This indemnity
 shall survive payment of this Note.

 Customer acknowledges that Lender has not made any representations or
 warranties with respect to, and that Lender does not assume any
 responsibility to Customer for, the collectability or enforceability of
 this Note or the financial condition of any Customer.  Customer
<PAGE>
 authorizes Lender to disclose financial and other information about
 Customer to others.  Each Customer has independently determined the
 collectability and enforceability of this Note.

 Without affecting the liability of any Customer, surety, or guarantor,
 Lender may, without notice, accept partial payments, release or impair
 any collateral security for the payment of this Note or agree not to
 sue any party liable on it.  Without affecting the liability of any
 surety or guarantor, Lender may from time to time, without notice,
 renew or extend the time for payment.  The obligations of all Customers
 under this Note are joint and several.

 To the extent not prohibited by law, Customer consents that venue for
 any legal proceeding relating to collection of this Note shall be, at
 Lender's option, the county in which Lender has its principal office
 in this state, the county in which any Customer resides or the county
 in which this Note was executed.  This Note shall be construed and
 enforced in accordance with the internal laws of Wisconsin.

 This Note is intended by Customer and Lender as a final expression of
 this Note and as a complete and exclusive statement of its terms, there
 being no conditions to the enforceability of this Note.  This Note may
 not be supplemented or modified except in writing, except as set forth
 in Exhibit A attached hereto.

                       PREAUTHORIZED TRANSFER DISCLOSURE

 When Customer authorizes Lender to obtain payment of amounts becoming
 due Lender by initiating charges to Customer's account, Customer also
 requests and authorizes remitting financial institution to alert and
 honor same and to charge same to Customer's account.  This
 authorization will remain in effect until Customer notifies Lender and
 the remitting financial institution in writing to terminate this
 authorization and Lender and remitting financial institution have a
 reasonable time to act on the termination.  NOTICE OF TRANSFERS VARYING
 IN AMOUNT:  If Lender and remitting financial institution are not the
 same, Customer is an individual, the account was established primarily
 for personal, family or household purposes and the regular payments may
 vary in amount, Customer has the right to receive a notice from Lender
 10 days before each payment of how much the payment will be; however,
 by signing this Note, Customer elects to receive notice only when
 current payment would differ by more than 100% from previous payment.


                     EXHIBIT A TO REVOLVING BUSINESS NOTE

      This Note bears interest on the unpaid principal balance before
 maturity (whether upon demand, acceleration or otherwise) at an annual
 rate equal to the Adjusted Interbank Rate (as defined below) plus 225
 basis points, which rate will change as of the first day of each
 calendar month.  If the first day of any calendar month is not a
 regular Business Day, the Adjusted Interbank Rate shall be established
 on the preceding Business Day.  "Business Day" shall mean any day other
 than a Saturday, Sunday, public holiday or other day when commercial
 banks in Wisconsin are authorized or required by law to close.
<PAGE>
      "Prime Rate" means an annual rate equal to the interest rate
 publicly announced by Lender from time to time in Milwaukee, Wisconsin
 as its base rate for interest rate determinations.

      "Adjusted Interbank Rate" means an annual rate for all loans
 evidenced by this Note (the "Loans") (rounded upwards, if necessary, to
 the nearest 1/100 of 1%), determined pursuant to the following formula:

                  Adjusted Interbank Rate           INTERBANK RATE
                                                1 - Interbank Reserve
                                                    Requirement

      "Interbank Rate" means with respect to any Loan, the rate per
 annum equal to the rate (rounded upwards, if necessary, to the nearest
 1/16 of 1%) quoted as the rate at which dollar deposits in immediately
 available funds are offered on the first day of each calendar month in
 the interbank Eurodollar market on or about 9:00 A.M., Milwaukee time,
 for a period of thirty (30) days.  If the first day of any calendar
 month is not a regular Business Day, the Interbank Rate shall be
 established on the preceding Business Day.  Lender currently uses the
 Knight Ridder Information Service to provide information with respect
 to the interbank Eurodollar market, but Lender may change the service
 providing such information at any time.  Each such determination shall
 be conclusive and binding upon the parties hereto in the absence of
 demonstrable error.

      "Interbank Reserve Requirement" means a percentage (expressed as a
 decimal) equal to the aggregate reserve requirements in effect on the
 first day of each calendar month (including all basic, supplemental,
 marginal and other reserves and taking into account any transitional
 adjustments or other scheduled changes in reserve requirements during
 each calendar month) specified for "Eurocurrency Liabilities" under
 Regulation D of the Board of Governors of the Federal Reserve System,
 or any other regulation of the Board of Governors which prescribes
 reserve requirements applicable to "Eurocurrency Liabilities" as
 presented defined in Regulation D, as then in effect, as applicable to
 the class or classes of banks of which Lender is a member.  As of the
 date of this Note, the Interbank Reserve Requirement is 0%.

      INCREASED COSTS.  If Regulation D of the Board of Governors of the
 Federal Reserve System, or the adoption of any applicable law, rule or
 regulation of general application, or any change therein, or any
 interpretation or administration thereof by any governmental authority,
 central bank or comparable agency charged with the interpretation or
 administration thereof, or compliance by Lender with any request or
 directive of general application (whether or not having the force of
 law) of any such authority, central bank or comparable agency:

            (a)   shall subject Lender to any tax, duty or other charge
 with respect to the Loans, the Note or its obligation to make Loans, or
 shall change the basis of taxation of payments to Lender of the
 principal of or interest on the Loans or any other amounts due under
 this Note in respect of the Loans or its obligation to make Loans
 (except for changes in the rate of tax on the overall net income of
 Lender); or
<PAGE>
            (b)   shall impose, modify or deem applicable any reserve
 (including, without limitation, any reserve imposed by the Board of
 Governors of the Federal Reserve System, but excluding any reserve
 included in the determination of interest rates pursuant to this Note),
 special deposit or similar requirement against assets of, deposits with
 or for the account of, or credit extended by, Lender; or

            (c)   shall affect the amount of capital required or
 expected to be maintained by Lender or any corporation controlling
 Lender; or

            (d)   shall impose on Lender any other condition affecting
 the Loans, the Note or its obligation to make Loans;

 and the result of any of the foregoing is to increase the cost to (or
 in the case of Regulation D referred to above, to impose a cost on)
 Lender of making or maintaining any Loans, or to reduce the amount of
 any sum received or receivable by Lender under this Note with respect
 thereto, then within ten (10) days after demand by Lender (which demand
 shall be accompanied by a statement setting forth the basis of such
 demand), Customer shall pay directly to Lender such additional amount
 or amounts as will compensate Lender for such increased cost or such
 reduction.  Determinations by Lender for purposes of this section of
 the effect of any change in applicable laws or regulations or of any
 interpretations, directives or requests thereunder on its costs of
 making or maintaining Loans or sums receivable by it in respect of
 Loans, and of the additional amounts required to compensate Lender in
 respect thereof, shall be conclusive, absent manifest error.

      DEPOSITS UNAVAILABLE OR INTEREST RATE UNASCERTAINABLE.

            (a)   If Lender is advised that deposits in dollars (in the
 applicable amount) are not being offered to banks in the relevant
 market for periods of thirty (30) days, or Lender otherwise determines
 (which determination shall be binding and conclusive on all parties)
 that by reason of circumstances affecting the Interbank Eurodollar
 market adequate and reasonable means do not exist for ascertaining the
 applicable Interbank Rate; or

            (b)   If lenders similar to Lender have determined that the
 Interbank Rate will not adequately and fairly reflect the cost to such
 lenders of maintaining or funding loans based on the Interbank Rate, or
 that the making or funding of such Interbank Rate loans has become
 impracticable as a result of an event occurring after the date of this
 Note which in the opinion of Lender materially affects such Interbank
 Rate loans;

 then, so long as such circumstances shall continue, Lender shall not be
 under any obligation to make or continue Loans based on the Interbank
 Rate and on the first Business Day of the following calendar month,
 such Loans shall bear interest at the Prime Rate.  If such an agreement
 cannot be reached, such Loans shall be repaid in full by Customer.

      CHANGE IN LAW RENDERING INTERBANK RATE LOANS UNLAWFUL.  In the
 event that any change in (including the adoption of any new) applicable
 laws or regulations, or any change in the interpretation of applicable
<PAGE>
 laws or regulations by any governmental or other regulatory body
 charged with the administration thereof, should make it unlawful for
 any lender to make, maintain or fund Loans based on the Interbank Rate,
 then:  (a) Lender shall promptly notify Customer; (b) the obligation of
 Lender to make or continue Loans based on the Interbank Rate shall be
 suspended for the duration of such unlawfulness; and (c) on the first
 Business Day of the following calendar month, such Loans shall bear
 interest at the Prime Rate, with the interest rate to change on each
 day that the Prime Rate changes.

 Dated as of  OCTOBER 4, 1999.

 PLASTICS MFG. COMPANY & TECSTAR MFG. COMPANY (SEAL)


 By:   BRUCE SCHNEIDER                     (SEAL)
       Bruce Schneider, VP/Finance

           Appendix A to General Business Security Agreement between M&I
 Northern Bank ("Lender") and   PLASTICS MFG. COMPANY & TECSTAR MFG.
 COMPANY ("Debtor")

 (a)  DEFINITIONS.

     (i)   "QUALIFIED INVENTORY" means inventory (as that term is
           defined in the Wisconsin Uniform Commercial Code) [a]
           which is in good condition and is owned by Debtor free and
           clear of all encumbrances and security interests (except for
           Lender's security interest); and [b] the existence, location,
           amount and lower of cost or wholesale market value of which
           have been certified to in a manner satisfactory to Lender by
           a representative of Debtor within 10 days after the end of
           each month and, if checked here <square>, on the date of each
           loan.

     (ii)  "QUALIFIED ACCOUNT" means an account owing to Debtor which
            meets the following specifications:

           (a)  It arose from the performance of services by Debtor, or
                from a bona fide sale or lease of goods which have been
                delivered or shipped to the account debtor and for which
                Debtor has genuine invoices, shipping documents or
                receipts.

           (b)  It is payable not more than 30 days from the earlier of
                performance of the services, delivery of goods or date
                of invoice, and is not more than 90 days past due.

           (c)  It is owned by Debtor free and clear of all encumbrances
                and security interest (other than Lender's).

           (d)  It is genuine and enforceable against the account debtor
                for the amount shown as owing in the certificates
                furnished by Debtor to Lender.  It and the transaction
                out of which it arose comply with all applicable laws
                and regulations.  It is not subject to any set-off,
<PAGE>
                credit allowance or adjustment, except discount for
                prompt payment, nor has the account debtor returned the
                goods or disputed his liability.

           (e)  Its existence and amount have been certified to in a
                manner satisfactory to Lender by a representative of
                Debtor within 10 days after the end of each month and,
                if checked here <square>, on the date of each loan.

           (f)  Debtor has no notice or knowledge of anything which
                might impair the credit standing of the account debtor.

           (g)  Lender has not notified Debtor that the account or
                account debtor is unsatisfactory.

     (iii) "QUALIFIED EQUIPMENT" means equipment (as that term is
           defined in the Wisconsin Uniform Commercial Code) [a] which
           is new and unused and in good working condition; [b] the
           existence, location and amount of which have been certified
           to in a manner satisfactory to Lender by a representative of
           Debtor; and [c] which is owned by Debtor free and clear of
           all encumbrances and security interests (other than
           Lender's).

     (iv)  "LOAN VALUE" means the (<square> invoice) cost of Debtor's
            equipment (<square> less accumulated depreciation as
            determined in accordance with generally accepted principles
            applied on a consistent basis).

     (v)   "TANGIBLE NET WORTH" means the excess of total assets over
            total liabilities, total assets and total liabilities each
            to be determined in accordance with generally accepted
            accounting principles consistent with those applied in the
            preparation of the financial statements excluding, however,
            from the determination of total assets all assets which
            would be classified as intangible assets under generally
            accepted accounting principles including, without
            limitation, goodwill, patents, trademarks, trade names,
            copyrights, franchises, and certain other assets including
            investments, advances, and/or loans to affiliated business
            entities, officers, shareholders, and/or employees.

     (vi)  "DEBT/TANGIBLE NET WORTH" means the relationship expressed as
            a numerical ratio, between [1] the total of all liabilities
            of the Debtor which would appear on the balance sheet of the
            Debtor in accordance with generally accepted accounting
            principles applied on a consistent basis, and [2] Tangible
            Net Worth.

 (b) BORROWING BASE.  The aggregate amount of all obligations at any
     time outstanding (except N/A) shall never exceed:

     (i)   WORKING CAPITAL LINE.  The lesser of $ 2,000,000.00  or an
           amount equal to the sum of:

           (a)  QUALIFIED INVENTORY.  For Qualified Inventory at cost
<PAGE>
                (determined in accordance with generally accepted
                accounting principles) or wholesale market value,
                whichever is lower, exclusive of any transportation,
                processing or  handling charges:

                Raw Material   50  % (Plastic Resin Only not to exceed $
                250,000.00); Work in Process  N/A %; Finished Goods 50%;
                not to exceed $ 250,000.00  in the aggregate; Total
                Qualified Inventory not to exceed $ 500,000.00 ; plus

           (b)  QUALIFIED ACCOUNTS.   80  % of the amount owing on
                Qualified Accounts INCLUDING FOREIGN ACCOUNTS RELATED TO
                MOTOROLA ONLY.

     (ii)  EQUIPMENT LINE.  Plus, the lesser of $  N/A   or   N/A  % of
           the Loan Value of Qualified Equipment.

     In addition to other required payments, Debtor shall pay Lender in
     reduction of the Obligations such sums as may be necessary from
     time to time to maintain the above ratio(s).

 (c) MISCELLANEOUS PROVISIONS:

     (i)   In Section 2, DEBTOR'S WARRANTIES.

           (n)  Debtor also warrants that its existing officers,
                directors, and shareholders are as set forth on Exhibit
                OM as attached hereto.

     (ii)  In Section 6, DEBTOR'S COVENANTS.

           (1)  Net Worth.  Debtor shall maintain at all times a
                Tangible Net Worth of not less than $ 1,000,000.00
                TO BE $1,500,000.00 BY 9/30/00.

           (m)  Debt/Tangible Net Worth.  Debtor shall maintain a
                Debt/Tangible Net Worth ratio of not more than  N/A to 1.

     (iii) In Section 8, DEFAULT.

           It shall be an additional event of default under this
           Agreement if  (               )  shall cease to be the
           (          )  of the Debtor.

           It shall also be an event of default if a "Change in Control"
           shall occur.

           As used herein, a "Change in Control" shall be deemed to have
           occurred if either (a) any person or entity shall acquire,
           directly or indirectly, beneficial ownership after the date
           hereof of more than 50% of the voting stock of the Debtor or
           (b) during any period of 12 consecutive months, individuals
           who at the beginning of such 12 month period were
           shareholders of the Debtor shall cease for any reason to
           constitute a majority of the shareholders of the Debtor.
<PAGE>
                                      PLASTICS MFG. COMPANY &
                                      TECSTAR MFG. COMPANY

 Date:     OCTOBER 4  , 1999          BY:  BRUCE SCHNEIDER
                                           Bruce Schneider, VP/Finance

                          AMENDMENT NO. 1

 Appendix A to the General Business Security Agreement dated October 4,
 1999, in which PLASTICS MFG. COMPANY & TECSTAR MFG. COMPANY are the
 Debtors and M&I Northern Bank is the Lender, is hereby amended to read
 as follows:

 (b)  BORROWING BASE.

      (i)  WORKING CAPITAL LINE.  The lesser of $3,000,000.00 or an
           amount equal to the sum of:

           (a)  QUALIFIED INVENTORY.  For Qualified Inventory at cost
                (determined in accordance with generally accepted
                accounting principles) or wholesale market value,
                whichever is lower, exclusive of any transportation,
                processing or handling charges;

                Raw Material 50% (Plastic Resin Only) (not to exceed
                $250,000.00); Work in Process N/A%; Finished Goods 50%
                (not to exceed $250,000.00); Total Qualified Inventory
                not to exceed $500,000.00 in the aggregate; plus

            (b) QUALIFIED ACCOUNTS:  80% of the amount owing on
                Qualified Accounts INCLUDING FOREIGN ACCOUNT RELATED TO
                MOTOROLA ONLY.

      (ii) EQUIPMENT LINE.  Plus, the lesser of $N/A or N/A% of the Loan
           Value of Qualified Equipment.

 (c)  MISCELLANEOUS PROVISIONS:

     (i)  In Section 2, DEBTOR'S WARRANTIES.

          (1)  Net Worth.  Debtor shall maintain at all times a Tangible
               Net Worth of not less than $3,500,000.00.

 These are the only changes and all other provisions of said Agreement
 remain in full force and effect.

 Dated     JANUARY 18, 2000             PLASTICS MFG. COMPANY & TECSTAR
                                        MFG. COMPANY

                                        BY:   BRUCE W. SCHNEIDER

                                        M&I Northern Bank

                                        BY:   VICTOR S. KEARNEY
                                              Victor S. Kearney,
                                              Vice President