You might be able to play with a sheet of aluminum foil to see if you are getting electromagnetic interference from somewhere, it should act as a barrier to the em source. FWIW, made the same upgrade & did not get any ill effects.
VPI Aries 2 platter is creating hum
My new Aries 2 platter is creating hum. Thought it was a grounding issue to begin with. But, when all efforts failed to eliminate it, I re-installed my original platter once again. Dead quiet. Has anyone else experienced this? Curious as to the cause of this problem.