G'Day Rob,
First of all, congratulations, I strongly admire people who think out of the box.
My question is how did you decrease the weight/surface area relation, for example comparing to a tornado. On light winds I can see the advantage, as you basically don´t need the weight of the winward hull, but on strong winds I believe that the extra weight of the cat would be an advantage, because the weight of the winward hull and the weight of the rig are helping to reduce heel. In this boat, all the weight of the boat, except for the crew and the small hull do not counterbalance heel.