I posted a few weeks ago a photo of my new homebuilt cat in the general forum. Later I discovered there was an special forum for home built cats.
So here it is :

http://www.catsailor.com/gallery/displayimage.php?album=lastup&cat=&pos=4



Design is based on Prindle-15, but with adaptions: more volume in front (anti-dive), higher hulls, standing surface on the side and last but not least wider (2.50 m).
It is constructed with a shaped foam core and a ca. 1 mm glass/carbon/kevlar epoxy lay-up skin. Beams are fixed and selfmade of foam,wood and a mixture of glass/carbon epoxy. Surprisingly I had no need for a dolphin striker, it was strong and stiff enough.

Hull weight is 29kg each, and the total weight is around 110 kg.
It sails like a beast on my home beach; which is the North Sea shore on a spot with a very rough sea.
Strenght was the main issue and improved sea behaviour. I'm not a speed man. Often I go too fast at sea, I let rope out to slow down!

I'm curious if anyone else has done something like this also and what his specifications were.
Also I plan to home-built the mast of carbon (in this month I spoiled two old masts!)
Has anyone experience with mast building?