As per your quote, Carl, "I think you are on the right track and should just float a trial very basic set of formula 20 rules based on more updated newer designs being able to fit within it" I think you're right and that's the way to go.

It should be flexible enough to allow boats that are out there today. As a rule, we should go with an 11' beam (or is there a motion to make it 12'?) to allow the new F20 Carbon, but I noticed on the link sent by Cyberspeed that the sail area on the new Nacra F20 is 226 sq. ft. The sail area on my Inter-20 is about 192 sq. ft (without the mast), so is the 226 number on the F20 Carbon with or without the mast? Does anyone know?

I imagine the Carbon would blow the Inter 20 away for several reasons, including the additonal roughly 32 sf of spin area. But I'll propose that we worry about that when Carbons start showing up in the U.S. on a regular basis.

There's some Inter-20 sailors I know here in Texas who are unhappy with main sails coming from E/P these days, thus the movement to go to F-20. "Stay within the specs and get your sails where you want."