hull design

making a 6’3"x21 something" quad fish, 9" tail tip to tip. EPS foam. wondering about tail hull design. do i want to collect the water tward the stringer running it more against the foilside of the fin with concave, or do i want to shed it from the stringer with vee or convex to run it more into the leading edge of the fins, passing it between them. planned on; slight concave at nose to flat to rail to rail concave to double concave with vee to belly with high point at 12" up from tail. hoping that the quad will even out the lift lost by the belly. while i’m here… rear fins, closer to rail, closer to stringer, what is the performance difference.

    thanks to all,