It had to be at least 10 years ago when we tried to start an F20 class to include such boats as Mystere 20, Narca 6.0, Prindle 19 (this was before the I-20 was born).
It did not fly.
However, because of this attempt, Randy developed the P19 so it competed with the bigger boats.
So, it can be done.

Trouble is you have to all get together and start an all inclusive formula class -- one that does encompass already available boats.

Allowing outside parts, tramps and sails really makes for more one-design sailing. Without fear of being pooh-poohed, look at the Wave Class. The Hobie Class back then would have rather had us buy expensive, cookie-cut sails that were not very good. A light woman does not want the same sail as a larger man, yet that has been how the Hobie Class has operated. But we allow outside sails and it has worked awesomely. There are over a half dozen sailmakers that have been doing R&D and coming up with some pretty darned good designs for the weight and ability of the helmsperson.
By breaking free of that class and forming our own, the class has grown tremendously and is still growing more and more each day.

I can forsee some of you that are strong willed, getting together (We do have a forum for F20 right here on this site) and being the catalyst to get the F20 off the ground and flying. Still lots of Inter 20s around.., and still lots of Nacra 6.0s (they could be souped up with a square-head main, etc.)

Good time to really get it together would be for the Tradewinds. And if not enough folks show up to make an F20 class, the you still have Portsmouth.
But, on the other hand, if you got 7 or 8 I20s, 3 Nacra 6.0s, and a Mystere 6.0 to all agree to the box rules, you could have a lot more fun.
And while at the event you could hone in on the rules a bit better as well. Plenty of time in the evening to do such things.

Back to the original thread.., yes, it would be a lot, lot cheaper to upgrade your boats with better designed sails and better equipment.

Good luck,
Rick