I'm jealous.

I believe that the Melges 20 has an open sail rule. It sure hasn't hurt their class. But, you folks sitting here arguing among yourselves isn't helping anyone.

In my opinion, stay 1 design. Your Nacra 20's have no equeal. But keep the stock sail dimensions, but allow your choice of sailmakers.

Maybe search out the Cal 20 class. Its a monoslug member of the dead boat society, but due to loyalty of the owners, it is an active class.