nice reply wouter, the F16 sounds awsome, tell me what is the yardstick of a foiling moth in under 5 knots? those yardsticks are taken in various wind strength etc, it may be that a F16 with equal crew weight to a C20 sailed in under 5 knots or a heavier crew on the c20 sailed in 25 to 30 knots with its wider beam the difference may be way more than you have said, that i am not sure of. Dont mean to throw mud but that is what the forum is about, thats how we learn...thanks