I own a WTRP. I had this same problem. It is not really a problem. Your have to make sure there is enough Sylicon Fluid inside The main Bearing Thrust because tha't's the clue to the Stability of the platter as this TT is bearingless as you know. Because of the way this TT is built, there is no way it can have any mechanical problem. The Solution is the Fluid !.
Also is very important to check the TT level.
David
Also is very important to check the TT level.
David