sounds like you're going to be making a plywood board then..when i made plywood boards i'd just laminate 3 sheets of 3mm plywood togehter and put it under a few hundred pounds of bricks with 2x4's on the ends and let it cure/set.
i'd suggest drawing your outline on the board before laminating.
now sand/router the edges and install the t-nuts, then seal the board with a few coats of varnish.
holes for fins are nice too...draw those out when you make the outline of the board.
but you put the 3 laminates together and then what do you do? just put the weight?
i heard that you have to moisture it?
if so where? in the middle?
if so? do you do it with the 3 laminates all ready togethers or one by one?
how do i put the holes for the fins?
i am thinking of making one and i thing that 3 fins like in a surfboards but in both sides..
also i am thinking about puting the 2 that goes in the outside like in a race board...does this makes sense? like the one in the middle straight and the others 2 in an angle
any ideas about how to but those in that shape?