To Whom It May Concern:

Subject: American Airlines Terminal - Raleigh/Durham Airport, N.C.

Prior to my retirement in 1989 I was employed as Vice President of Engineering and Construction for the Elwin G. Smith Division of Cyclops Industries. During much of the 1980's I was associated with Dr. Raymond Ting who was retained as a consultant to the Smith organization for the refinement and development of some of their curtainwall products. I believe it was in 1986 that Smith was successful in contracting to furnish and erect the curtainwall on the subject building. The job consisted of approximately 400,000 square feet of glass and metal panel of somewhat conventional design. The timing of the contract award was coincident with the development of a new curtainwall system fostered by Dr. Ting and being tested in Smith's research facility. I invited the Architect for the American Airline project to Smith's lab to witness the tests. Convinced that the product under test was superior to that which the Architect had specified, and that there was a significant labor savings to be realized if it was used, I offered the Architect a $10,000.00 credit if he would adopt this prototype product for the project. Hence the first version of the current TingWallR® was born.

During the course of the project being constructed in the field my early expectations were proven correct. Our manufacturing facility had to increase their productivity on several occasions just to keep pace with the erection crews in the field. The aluminum plate panels, glass and other elements of the installation went up like clockwork. We were able to leave construction openings in the wall for various access, return at a later time and fill them in easily. The project was a success in all ways as far as the curtainwall was concerned. It looked great, performed well, and went up with ease.

Sincerely,

David L. Blackson