Wow! He's pushing that boat hard since he doesn't have the SB board anymore. Does the foiler help with righting moment? I thought he was going to broach a couple of times in that video.
The foil is quite a bit off the centerline of the boat so I would guess that it adds quite a lot to the righting moment of the boat. I thought it might have been a little odd that his keel seemed to be nearly centered - they have the ability to cant that thing quite a lot. Perhaps he discovered that he needed it to prevent leeway in the absence of that foil. That would also further decrease righting moment. He sure was flying a lot of sail!
