Hi There, indeed those are the 2 best sizes for the 114 or newer 115, at least in Duotone and other sail sizes. So I expect it will be the same for you. With some pumping, you can cover with your weight, approx 12/15 knots all the way up to 30knots with the 114, if you have 2 fins - 36 for the 7.0, 37 or 38 for the 7.6? Good luck! Mast track fairly far fwd when overpowered helps.