Just got a new (e-bay) Pioneer PL-112D. The guy didn't pack it well, and the tonearm was disengaged. It has lateral attachments and bearings at the pivot. I reattached it, but there seems to be a looseness or wobble in the arm pivot. Nothing appears broken. I looked "under the hood", and don't see any tightening mechanism. I looked at the Vinyl Engine instruction and service manual, and it wasn't very helpful. Anybody have any thoughts or need for further clarification?