Mines made of 2x6's, and about 5 coats of polyurethane. Then I have a piece of 3/8 pexi-glass for flatness, painting, glueing and such. It's only 2 ft deep though, and against a wall. So when I need more I have a 3x6x3/4 ply I put on saw horses. I picked up these realy cheap, and cheap looking plastic saw horses at Harbor freight, for 12 bucks each. They really look flemsy. But, at the store, I leaned my 216 pound body on it pretty good, and got no flex from the legs. I couldn't believe it. They are super light and fold and take up almost no room. With both open, and a sheet of 3/4 ply over it, it's pretty darn sturdy too. Might be a little short for those of you (probably MOST of you) of normal height.