I tried to convince you that a good team can sail an F18 very well at 400-pounds. I even named names. But I never argued that it was optimal weight. The latest boat and sail designs penalize teams at minimum weight and make it possible for bigger teams to be competitive. Once a hull is out of the water and the lighter teams start depowering, the big boys start going to work in a big way. Look at the Tradewinds results for F18s. None of the top three are under minimum - I'd bet they're all around 345 or so. In the conditions you had, an accomplished 400-pound team would have really done well, I imagine. The problem for a bigger team comes when the breeze is around eight or nine instead of 15 knots - lighter teams start flying a hull sooner.