Idk...not a longboarder nor skater...but usually to get the concave/camber with wood it is done with steaming and glue up on a jig and will also depend on the cut of the wood...face vs qtr sawn. Most decks are a glue up epoxy lam that is probably done with a press/jig or a vacume clamp/jig. I'd imagine with pine and if you used regular white wood glue it will likely snap and will not hold up to the flexing. I've made a couple of hack decks for the kids using scrap bamboo flooring, old garage door parts and old trucks/wheels found at a garage sale for $1. The one on the left is a 42 x 8" heavy battle ram that runs pretty smooth, doesn't handle curbs and will take out sizable animals for roadkill.