Hi Thom
It seems local clubs and fleets are starting Formula groups for fun and of necessity to race 20s easily together.
Rules vary to accomodate local sailors needs and requirements . I roughed in some basic parameters years earlier ,---Viewing forum: Formula 20 Forum---
Would agree on 20 ft category race groups with slight variation in rating ,-but based in a design measurement rating that directly related sail area -weight and beam ,variables . Wouter recently published a rating version with 2 wind speeds ,-I think combining this with Pn yardstick would be the ideal rating system that would encourage similar length race groups to develop ,many then would over time modify into equal race types built by numerous builders and modified to individual preferences .
In other words ,-I,m really not sure what the #$@% the very best answer is
--It seems to be being desided by local sailing groups of 20s as it should be .
- happy to see em and help them develop if possible .
The sport certainly has not developed under current classes or rating rules .
all the best Thom
Carl