Notice that the N20 already carries 257 ft^2 upwind? Its a screamer too; the difference is the F20, besides having slightly more sail area, has a more efficient rig with the wing mast and higher aspect ratio mainsail. The C foils and the new hull shape make a huge difference. ONE of the reasons the latest F18's can hang with the N20 is the new hull shape, which carries weight better and handles rough water better than the older F18's. The other is sail shape and we are fixing that.