Cross section scale

Hello, I’m attempting to make a model of a surfboard that can be customized using various parameters.
First, I’d like to know how I can design a variable cross-profile section so that I can better manage the scale of the profiles.

Second, I’d like to know whether there’s a method to add a curve throughout the length of the board to produce a “surfboard rocker” that I can modify with parameters. rephrase


Screenshot 2023-05-29 234811
Screenshot 2023-05-29 234712