Thanks for remembering how hard we tried to get a F 20 class going .
At the time there were 2 major 20 ft production cats --the Hobie Fox and Inter 20 --The I 20 was lighter and had 15 more sq ft in the main than Fox which complied to the EU f 20 CLASS specs ,
The F 18 class was basically started by a few guys in CRAM getting together with boat mfg reps and other groups around the country --they had an established EU F 18 class to work from and boats made to it specification wise.
In 2011 -we now suddenly have new interesting 20 ft designs on which to base F 20 CLASS SPECS .
THE MORE SIMPLE AND BASIC the BETTER --my preferance would be more of an A Class type model BUT MORE OPEN TO DEVELOPMENT .
We have a C Class of course for wings and big budgets --a great development type class and now AC racing larger versions of the tech developed --AMAZING !!
I LIKE WHERE DESIGN IS GOING --lighter faster lifting platforms .
I,d suggest looking at the old 18 sq meter rule which just set a 2 sided box rule of Length -sail area - no beam limit -no development limit thought wings are the thing nowdays .
Let the class develop from there -
The main thing is to get organized groups in established racing organizations to agree to race F 20 and then promote interesting new boats and design to it .
let me know if I can help .
regards
Carl