Hi Johnny. You seem to have done some good testing, great! And good luck with under the radar stuff - I think as more people do this it will build momentum to have regulations changed.
It sounds like you tested with no load? If so that would give far higher rpm than you will get with some resistance e.g. from a generator. The question is not how fast can it turn, but how much power (force x speed) can it output. So maybe do those tests again with something braking the rotation.
Of course you can generate AC with one rotor (if you manage to figure out a way to generate DC directly let me know!). Two rotors create much stronger magnetic flux, and so potentially more power.
Why do you say 'less resistance''? Is that because of one less bearing? Or less magnetic flux and therefore less current generated (and therefore less resistance)?
I suggest you make a rotor, place the magnets (they should stick fine at low rpm without anything to keep them in place), make a single coil with maybe 10 or 20 turns and spin the rotor by hand to see what voltage one coil gives, per turning per rpm, which I have found is linear (see my Benchtesting page). Then its easy to see how many volts you will get from the planned number of coils.
P.S. I don't want to be vain, but it is spelt 'vane'...