Bill,

Which of these "numbers" do you think are most relevant to beach cat design, my understanding is that these hull design numbers are just simplistic ways of describing the hull form and 3D CAD does a much more accurate job.

Certainly to take your example of stability, we can get much more accurate estimates from the 3D CAD data of the hulls.

I am not saying that anyone would start a hull design by making a pretty 3D model, but for reverse engineering existing designs it is probably the best way.

I am genuinely very interested in the design process you use to define a hull shape.

All the best

Gareth