Thanks for the explanation, Bill. The canted hull question is interesting and the thought of the sailplan forces driving the canted hull deeper into the water is interesting. Seems that it would have higher drag than non-canted hull design. Would that lead us to cant the hulls in the opposite direction resulting in less drag?

Cogito had canted boards that were asymmetric and canted inward to lift the hull, probably to reduce wetted surface area and drag. This design required that the windward board needed to be retracted when going to weather, which is probably not practical on most catamarans. I wonder, which of Cogito's boards (if any) should be down going downwind?