The red parts turn, the others not. I made this cutout in the fin to get a good design, where everything is intersecting saving a lot of space and at the same time providing support, some degree of protection for/from the prop, and a low drag. Flipping the motor into forward direction could work as well if you want to underride patent but has some drawbacks as you loose the mast as a part of protection. I think this design can be adapted to foil and mast easily. Make a longer nose cone so the cutout in the mast gets small or vanishes, put a prolonged tunnel over it.
One could also integrate the foil, mast, part of fuselage, motor holder and motor into one part, to come over the simplistic approach of modules.
Development could also end up with lots of modules stacked at the mast, like Doppeldecker foil surrounding the motor(s).
Who knows. For the moment i have this design, lets see what it can do. The old one is also in good shape, i can compare them maybe.
I plan to test in Hyeres starting end of month.
P.S. Did you find the innovation visible in the two pictures?