An almost-working wind turbine

This doesn't work. I almost got it to work. Almost. But it's the last step, the alternator - that's where I give up. So take this: It's most of a wind turbine. Belt drive, slip rings (yes, 3d-printed slip rings!), mount for bearings, tail. Just add blades, alternator and a load of rod, nuts and bearings.

Here's the saga on youtube:
https://www.youtube.com/watch?v=vM2g5w8oTNU
https://www.youtube.com/watch?v=7W7h4dITrac
https://www.youtube.com/watch?v=gVvhZ3p2AHI

What this needs is someon