Hi, I am going to build a catamaran this year, big enough to carry a couple of bachelors around the pacific, so it has to be built fast. I'm thinking something like around forty feet would be good. I studied catamarans quite a lot but that was quite a few years ago. The reason I want aluminum is because I have built a couple of powerboats using 'heavy' aluminum (1/4") and it is such a fast material to build with, and it is also very tough and puncture proof and shatter proof. It would need to be a hard chine hull in tortured aluminum. if I recall correctly, the Wharram boats don't have a hard chine, do they? It doesn't need to be fancy, simple and plain and maybe a bit crude here and there is fine with me, it just needs to get done quickly, so I envision smaller cabins. I really want the long slender huls in order to go fast, not for big living space. I also saw somewhere here that the Tiki designs are faster than the Pahi designs and I wonder why that is?