Mike with your mast I would not hesitate in building a MH kite for your boat. The Forte rig is so stiff that I would not worry at all. We did a MH kite with a flat top for Jim Pearson on Slippery. That boat, which has since been sold, had the C Tech mast and he did put a set of backstays on just in case. I am not sure that he really needed them but he had them in case.