Tracking is wheels on rods like a model railroad engine, bearing of tonearm is some kind of gimbal.
There are 5 or 6 optical sensors, one of which in retrospect I may have activated by handling a flashlight while cueing up. One must read the manual or it can act like it has a mind of it's own. I guess it does in a way.
Just the tonearm on fleabay.
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Btw, does your tonearm have that very slight sloping down movement toward the spindle area?