Guys, I would forget about trying to wedge in the Marstom 20, Eagle 20 etc into this class. These are boats that don't really matter right now (because of the # of them out there)..They may in 10 years..

Just base the class on the T sport/Nacra 20/N6.0 and we have an instant class. I would make the minimum boat weight 380lbs, not less. 10' beam sounds reasonable
Dave