Of Polynesian decent... this rig pretty much develops its distinctive shape just by putting some bamboo yards onto the rig and hoisting it while hold the lower yard down. A small rope holding the small end of the bamboo yards. helps establish the crab claw shape.
It efficiency rivals that of the most modern rigs rigs around.
This is a shunting pacific proa where the boat can sail in either direction. The ama or small outrigger will always be on the upwind side... most proas have pretty small amas. I would say this one is rather large compared to the main hull but I wanted to allow for supporting a person out on the outrigger frame.
We shall see... thats what sea trials are for and hopefully that is not too far away.