Do I need flywheel/axle bearings?

[sota_dad]

…it's most often got to do with the generator unit vibrating inside the generator housing. …you may be able to fix it by placing a bit of tape on one of the features that is clamping the Generator Unit inside the Housing.

This was it! Thank you!!!

While spooling down, I noticed the cover had a little bit of rotational play, which changed the vibration noise slightly, so I removed the cover. The cover screws made a “crack” when I first loosened them, and they were very tight, probably tighter than I’d feel comfortable tightening them in ABS, but the cover itself had a little play underneath the tight screws. Strange. I added a little electrical tape to the top and bottom surfaces that hold the laminations of the pickup coils.

https://imgur.com/gallery/concept2-mode ... ns-1UWVz92

The noise is gone. Thank you again!

[c2jonw]

The noise is gone. Thank you again!

Great and you're welcome. I think the culprit was a tolerance stack up in the thickness of the laminations and the space available between the cover and base housing pieces. Easier than changing bearings!