We're all familiar with gluing up narrow pieces of wood to make a wider board. Is this feasible with plywood? I have a project made with 3/4" A-1 cherry ply ($$) and am short two shelves. I have some narrower stock from a previous project I could use to glue up the shelves (~ 2 pieces 20" x 20") from ~10" wide stock. I'm not worried about grain matching, and realize the glueup needs to be almost perfect, since I can't sand it flat. Assuming I could do this with cauls, whatever, would it be structurally sound?