Hakan
I think you are overreacting.
Ben's solid wing sail wasnt faster. No need to add a rule to legislate solid wings.
And so what if banana boards are faster? Adding them isnt going to be a big deal.
The CClass guys already proved that a foil borne boat isnt as fast as a catamaran with hulls in the water. So, the slippery slope to full foil borne cats wont happen, that experiment has already been done.
I dont see how adding a new curved daggerboard is going to make the boat worse. If you leave it in the current position it will help get the sterns out of the water downwind. Tell me why this is a bad thing?
A foil assist looks to be faster, but again I think thats were its going to stop. Go back and review the CClass experience, and then have a glass of wine and relax, its going to be ok.
I say we get rid of the "no hydrofoil" rule so all those off center daggerboard boats wont be obsolete.
Bill