Exhibit 10.15

                               [BEACON LETTERHEAD]

                                December 20, 2007

Dear Sirs:

      Bell-Haun Systems, Inc., an Ohio corporation (the "Payor"), hereby assigns
and BH Acquisition Sub ("Acquisition Sub"), a Nevada corporation, hereby assumes
certain  obligations in the total of $50,500.00 (the "Obligations") to Thomas O.
Bell, an individual residing at 6900 Stillwater Cove,  Westerville OH 43082 (the
"Payee").  Acquisition  Sub will issue and deliver to Mr. Bell a promissory note
in  the  principal  amount  of  $50,500  as  evidence  of  this  assignment  and
assumption.

      Thomas O. Bell, as Holder, consents to such assignment and assumption.

      This  Assignment  and  Assumption  shall be deemed to be  effective  as of
December 20, 2007 with respect to the Note.

                                        BH ACQUISITION SUB, INC.

                                        By: /s/ Bruce Widener
                                           -------------------------------------
                                           Bruce Widener
                                           President and Chief Executive Officer

Acknowledged and agreed to:

/s/ Thomas O. Bell
- -----------------------------
Thomas O. Bell


                               [BEACON LETTERHEAD]

                                December 20, 2007

Dear Sirs:

      Bell-Haun Systems, Inc., an Ohio corporation (the "Payor"), hereby assigns
and BH Acquisition Sub ("Acquisition Sub"), a Nevada corporation, hereby assumes
certain obligations in the total of $68,500.00 (the "Obligations") to Michael T.
Haun, an individual  residing at 13670 Duncan Run Road, Galena,  Ohio 43021 (the
"Payee").  Acquisition  Sub will issue and deliver to Mr. Haun a promissory note
in  the  principal  amount  of  $68,500  as  evidence  of  this  assignment  and
assumption.

      Michael T. Haun, as Holder, consents to such assignment and assumption.

      This  Assignment  and  Assumption  shall be deemed to be  effective  as of
December 20, 2007 with respect to the Note.

                                        BH ACQUISITION SUB, INC.

                                        By:
                                           -------------------------------------
                                           Bruce Widener
                                           President and Chief Executive Officer

Acknowledged and agreed to:


- -----------------------------
Michael T. Haun