Build a small version of the BMWO wing, with a taper towards the top and several adjustable flaps, with a mid slot to adjust for even more camber, there you go... Now, who's going to trim it for you on an A cat? Too many strings for that I think. It might work on a 2 up boat, and since a new mast for an I 20 is about $10K, why not start there? I'm sure Ben could build something suitable for about that amount!
