I'm in the camp with Bobp, very good notes are keep on each body style I build. Each body style has it's own formula for ballast weight, line tie position, lip angle, lip depth, line tie and hook hanger weights, and finally the wood blank weight. When that bait is finished it will be within of .010 of the finished weight in the formula or that bait does not make the cut. This is the process I use and it works for me. I do all my field testing in the warmer months.