I dunno if he does. But he did redesign the sail suite for the SeaRails about 4 years ago. I truly like the mainsail design. Jib design is "just OK" (10% camber and fits in the triangle...right?). Spin (not really a spin at 55% SMG) doesn't fly stable (for me anyway). I "get" that he can probably drive with it cleated, but I can't; so I redid my own at 82% SMG which does fly stable with me driving.