I’m shaping a 5’0" fish just for fun, from a 9’8" Takayama longboard that was ripped in half. Now, being a “fish”, I cut out a portion of the longboard that has similar rocker to what I was looking for (fairly flat), it’s pretty much the back 5’ of the longboard starting from where the fin box is/was…That leaves me with a tail that is almost already perfect in thickness, but as you could guess, the “nose” of my board is about 3 1/2" thick because that was almlost the exact center of the longboard. I don’t want to just take the foam off the bottom and give the fish 3 inches of nose rocker, but then again, if I try and mow the deck down, I think the foil would be completely screwed because the tail is where I want it but I’d have to take down about 2 1/2" to get the nose down to the correct thickness…Make sense? I know I should go buy a close tolerance blank for what I want to make, but I have a bunch of beatup boards laying around that I want to practice with…Any ideas? Thanks.
Just stick the blank up on racks, so you can see the profile.
Imagine the “idea” (in your mind) rocker, thickness flow, profile etc. from that side view, including deck profile, and look again at your blank.
Take a marking pen and mark the profile (thickness flow) YOU think you want to shape and surf.
Do whatever it takes to match that marked profile.