I will be watching your progression. I've been kiting for years and recently aquired a foil board . I had been thinking ok making my own as well. I have a sheet metal background and thought ... How hard can it be?. Well, after reading others who have made their own I decided to put making one on hold. It looks simple enough but I there are issues to consider. Seems the forces on the mast cause many to flex and break. The fuselage can flex as well. The wings have very different characteristics depending on their size,shape,and relationship to each other. I have often thought of the feasibility of using foils on a downwind board. Good luck and keep the pics.coming.