build it and they will come. If there is a successful F20 class there will be manufacturers. However, no manufacturer is going to jump in and try to develop an F20 class so he can have more competition among the other manufacturers...why should they?

F18 was created in Europe by the sailors - not the manufacturers.

One one hand I like the idea of opening up the Nacra 20 (by the sailors) to custom sails, masts, and rigging. However, I don't think the class has the strength to survive the shift. It would be much like the Nacra 6.0...although it won't have a directly competing boat to steal class sailors. True, there may be some component of an arms race but it will be negligible. Everybody thought that F18 would become that but it never really has. In fact, sails for F18s are very economical. A-cats too (although if you want the champion's sail shapes you will pay for them)