Im very attatched to my mast as it is only 3 mths old, we just launched another I17 and we put a F18 spinaker on it, had to go a little higher up the mast but it worked ok in light breezes, lot of sail for 1 up and the mast had a lot of bend but it is a wing shape and was rotated, I would like to have a bigger head LOL wouldnt we all but also go up higher as the 18ft skiff do, will talk to nacra about this as they are the ones to give the ok and so far they seem to want to go that way...Thanks for the advice