DrZoidbergWhat kind of wood? If you plan on skateboarding, it's pretty much maple or die. You can use others, but, maple is the de facto standard and best. What's the thickness on the wood? Got your grains running from nose to tail? does the plywood have an opposing grain structure in it, for torsional rigidity as well?
Also, it's much easier to press concave and kicks into it before it's cut into it's final shape. It's also easier to press the concave in rather than glue it flat and bend it. Is your glue water resistant, like titebond 3 or something similar? And what about the glue already used in the plywood?
Not try to hate, but, those are my tips to make it out better. Water bends are possible, but I think people usually do it with a v lam structure, not an h lam like a normal skateboard. Doing it your way, you're going to need to bend the wood over a bar running nose to tail direction to get concave, and bend it over something running edge to edge to make a nose and tail. the middle stops near the bolts for the trucks, where the kicks need to start. There needs to be some transition too. Go on silverfish and read the board building forums.
Source: I've built quite a few longboards with a variety of curves and concaves using a vacuum bag and a bolt press. Bolt presses are annoying.
Keeping ALL this in mind for my next one. All I know is I found a few pieces of wood in my basement and I'm giving it a shot. I'm about to soak it and put some weights on it to mold it. Tomorrow I'm gunna sand it and post the final product.
Thanks everyone for the help! It's been really useful!