Hi David,
Just a thought for you. The A018 design features a fixed duct. How about adding a tip ring to the turbine blade assy, embed magnets in the ring, and put windings in the venturi? duct? diffuser? to form the alternator coil element?
For the A007 design, the magnets could go in the existing "curvy aero thingy tip ring" and the coils in a sector arrangement near the tip ring.
Again, that is a beautiful design.
Yeah, I'm an electronics guy, not an aero guy.
TTFN,
Dennis