Quote Originally Posted by Charles Taylor View Post
any thoughts on rail shape with concave... I am merely a novice surfboard builder and know very little, I just want to make myself a quiver. THanks
Bravo, brother... that's what it's all about.

I think you're on the right track with the 80/20 down rail with the concave. That's a pretty basic, reliable design. Lowering the rail apex will create a hard turn at the bottom of the rail radius, into the bottom, at the edge of your concave. Your tail looks pretty wide from the pics, so I'd keep it soft... no hard edge... so you're not fighting the planing force, and it rolls over onto the rail a little easier.