LETTER OF REFERENCE

September 5, 2007

To Whom It May Concern:

Sierra Properties worked with Weathersure and Billy Bratton on a major Class A Office Building window leak repair project in 2007.  Billy was a pleasure to work with, completing the project in a timely manner, responding immediately to any questions and concerns and completing the project within budget after careful testing to determine that the repairs were working as planned.

The office building is leak free for the first time in 10 years.  We are looking forward to embarking on an additional project with Billy in the very near future.

Sincerely,
SIERRA PROPERTIES, INC.

Libby Luken
Senior Manager Asset Services

COMMERCIAL REAL ESTATE ASSET MANAGERS
5555 TECH CENTER DRIVE SUITE 125 · COLORADO SPRINGS CO 80919 · TEL 719.277.0473 · FAX 719.277.0535