What does the turtable do? Im guessing you pedal at 33 1/3 listening to "Dead mans Curve".Or is it a generator to power your the therimin? I give up. Your toys are too cool.
Yes, I slide the 5/8 inch shaft down another foot or so and then I can lift up
the bike and walk around (rotating on the turntable--45 rpm please!)
so I'm headed the other direction.
Theremin runs converted 12 volt dc so my 48
volt pack for the hub motor would have to be stepped down.
But it's a thought !