How do you know? Do you have an in with Nacra? F17 = 156kg & FX-One = 148kg. Maybe that had something to do with the low interest by the single hand sailors? Also, there is a lot to be said about a formula class where boats are from several manufacturers and none of the problems you get with a single manufacturer one-design. F16 is a great example where the formula class principles work; for example the newer hull design. Frankly, I believe all of the builders love the idea that they can sell the same boat to more sailors, both uni and 2-ups. The only ones with major gas pains about the class seem to be inactive or non-members in the class. Nacra and AHPC are also leveraging their market even further by producing a boat that is 104 compliant. Good for them. AHPC has made the strategy work. Nacra can do the same. As said before, weight is not proving to make a huge difference with the sail plan and newer hull designs....So much so, that SCHRS is rethinking its model relative to weight.