I gotta agree with you macca on that point, why cant the other sailers allow you to use curved boards and in return you give up some yardstick, 1 or 2 points whatever, at least this gives the class the chance to develop further and explore other possible benefits for the future and will not encourage newer more modern classes as you will already be cutting edge, i recently raced a nacra 16square, he still had the pinhead but carried a mid pole spinaker, all i could say was WOW! he dropped 3 points off his yardstick and it went downwind real fast, i would not call that cheating, but ruls being ruls he was not allowed to use it other than club racing. anyhow i think you all are right about the wings and i thank you for the input, they will definately be detachable sorry about the engrish