Nice site with a designer, Chris Ostlind. who has a cat (or few) under construction, and lots of other nice write-ups and articles. He even has a power cat design in the works.

I also found his take on patents for "home inventors" a valuable viewpoint. Probably a lot of us home boat builders have ideas that we’ve considered in the "invention" category. The comments have some valuable feedback and other ideas on protecting your invention.