Well gang, I got up this morning thinking about that board and decided to just go ahead and frame it. The frame is screwed in place and it would be simple to make any future adjustments. Final height is 40" but I can reposition the wheels and lower it 3 inches if needed. It is flat as flat can be. Now I can move on to building. Probably more questions to follow later.

Thanks to all for the tips and suggestions.

PatrickCurry I know how that hurts. I have stumbled a few times myself. I try to wear steel toed boots or sneakers when possible. I have been pained for not doing so.