I have a 1999 1200M3D, I replaced the bearing with a new one about 6 years ago and also put a Delrin thrust plate on it from KAB.
I noticed some noise when putting my ear close to the platter, like a rubbing noise.
Spinning by hand I still hear it.
Pulled the platter off and turning the spindle by hand I hear it.
When I removed the bearing from the turntable and turn the spindle by hand I don't hear the noise.
Any ideas?