Building a bookshelf with 3/4 inch plywood (AC pine). The bottom of it is a piece of 2x12 I had tying around. I was going to screw the sides into the bottom piece with wood glue. And I was going to use finishing nails and wood glue on the top shelf (and maybe reinforce it with something to make it more load bearing). But, should I use corner clamps when I assemble them, and while the glue dries?