So any one have any tips for figuring out how much spring back you will get after breaking vacuum? Making my first board with a pine core and looking for 1.5-2" of rocker in a 145/45 cm lightwind wake style board.
How tick is your pine? You question is really about how much FG or/and C on top of your deck.
If using 2 pine board layers, than the answer is almost none (build a concave in as well). Glass it after...Done.