If an open class is the answer, it is misguided thinking that simply taking ideas from an open forum is sufficient. "I'm currently doing my" does not lead to confidence in contributing. Your formal claim of ownership in letter form on your site reinforces your intentions. You should look toward the open source software licenses for guidance on developing a community based, community owned endeavor. Your current attempts are really no different than any of the traditional manufactures with their class associations.

On a related note... do you know about the existing Newcat F12 catamaran? Newcat F12 reference