Hi whidbey1

Take a look at my gallery. I have some photos of the garage-to-workshop conversion I am doing.

For my main buildboard, I adopted the method used by cafeenman of working with magnets. The base of the table is made from two Gorilla brand shelving units and the top is a box constructed from two sheets of MDF with a 1 x 2 interior frame, banded with 1x4 and topped with a 4 x 8 sheet of 16 guage cold rolled steel.
The base cabinets and countertops I built from scratch using MDF, poplar, birch ply and formica. I am in the process of building upper cabinets. Just finished the carcases for them today. 6 units that are 38 x 36 x 16 and 1 unit that is 38" x 30 x 16. Not shown in the photos is the AC unit I installed on the third wall.

Good luck on your workshop build!!

Scott