It is interesting to note that, of all the times I've seen GH taking his prototype out for test sailing - just beyond the marina's entrance, the winds have been calm. He also seemed to express some disapointment that during that December day of video shooting, winds were very light. Perhaps it was planned that way?
My reaction when first inspecting this
rig and watching the video, was how off-balanced the boom is from the boat's centerline. This must have some impact on weight distribution, especially higher up, affecting center of balance.
As Jeff noted, how does this boat behave in moderate to high winds, even when reefed? I would expect some serious heeling issues.