well sir,
i gotta say the rudder system is part of designing a cat, and the title doesn't say only the hull design. didn't mean to side track your thread.
i seek to post a side view of a c class hull which has a fast looking rocker. admittedly cogito has a curvier rocker and was faster around the course. cogito's hulls came out of the paitent lady molds which have got to be over 10 years old. so i recomend that you closely follow existing design.

the attachment seems to have worked. all i did was hit the browse button and navigate to my desktop where the picture resided. the catsailor server seems to host the picture for us once uploaded from our computers.