On 8/23/2013, Jim Cheatham wrote:
"I recently purchased a sheet of 3/8-inch 7-ply birch plywood (void-free) from Atlantic Plywood in Richmond, VA, for making my new floorboards. Real quality material and only cost $34. It is imported from Russia and is only available in 5' x 5' sheets. This is more than enough to get all 7 pieces".