The "new" A class sails have increased the square top so much that, not only do some of them actually have no roach at all, I have seen one new A class sail that’s leech is actually slightly concave. The guys sailing them swear that is exactly what they do - increase the usable area in light airs and twist off better with more gust control in the heavier stuff. Surely the Taipans could "optimise" their sail cut for F16 (as opposed to "one design") by having their mainsails cut with a larger square top, from my personal observations, I think that their performance would only improve with such a change?