I believe Russ lofted the free plans from the book and brought them up by enlarging them several times.

I would do your best to make sure both sides of each form are the same. then... as you strip, if you have an unfair area that bothers you, you can take the belt sander and take a lettle off if needed or staple some thin cardboard to the formn or several layers of duct tape to build up and area if needed or... let the strips float a bit. Just don't let the forms dictate unfairness. As somebody else said, it's an artform. The boat will paddle fine. You could cheat all over the place and never feel the difference. Don't obsess over it and just build.