Bob,
This is exactly what I covered in my Video of the "Dry" Test run from this morning.
I carefully angled the motor/gearbox assembly several times until the motor/gearbox and Universal Joint could spin at effortless manner without any hard points spots of stiffness. I did not start the Video until then.
The noise is just normal vibrations coming from the Dog Bone as it is in there somewhat snug and not tight so, it maybe creating some vibrations as it shifts a little.
As a matter of fact, the motor/gearbox assembly was at a higher angle with the previous Gearbox with the ruined Spur Gear and the angle was even more at a critical angle.
I hope and suspect that the up-and-coming "WET" Current Measurement in Bath Tub will exhibit even lower AMP Draw, not only taking account of the better angles but, realizing the more gearbox ratio of 2.5:1
Thanks so much!
Carlos[8D]