Good idea Less -think that should be the basis for the class .
Rolf ,I forgot where your from , but lets start a thread on the proposed international F-20 class and list the existing cats that would race within it -Tornado -Eagle -Ventilo 20 w 10 ft beam -
etc ,then allow others imput on the rules variables TAKEN CATEGORY BY CATEGORY

Crew weight boat weight sail area trade offs being the most contentious area generally .

DO YOU HAVE THE EXISTING 4 OR SO BOAT TYPES AND THEIR BASIC SPECIFICATIONS.

I would suggest a very basic A class type basic box rule to begin the class ,then let it evolve based on class partisipants .
As Less noted the B class exists but needs updating to reflect existing designs and modern material weights.

The big question ,how does a 376 LB Tornado compete with a 200 +LB mARSTOM ? Spin area compensation ,-jib compensation , then we have to verify this in realistic design theory terms and hope it proves out on the race course.

Perhaps a basic B box rule only is best