Thanks for filling in on the M-20 Tybee-500 boat Carl. It's strange, but I dont think I have seen it do well in any major events? Perhaps the really good crew's stay on their preferred platforms..
What class did the M-20 race in, open class?

I think it's wrong to say that lighter 20 footers need to cost US$30K. It might be so today for production boats, but even plywood hulls can be buildt lighter than boats fitting a F-20 rule based on the Inter/Nacra 20. If AHCP manage to build boats of identical stiffness and lifetime in either plywood or glass (Taipan 4.9), I am sure Nacra and Hobie can do the same.

I will not do any work on a F-20 rule based on the I-20 design. As said earlier, I think and feel that it is to heavy and narrow (there is also the issue of the US version vs. the EU version with less sailarea). Sorry, that's the way I see it..

I would be more interested in a rule setting e.g. the M-20 as the reference boat. Such a rule and class could produce boats able to race Tornado's, and T's are the current benchmark, first over the line.