just noticed something
Ok, just noticed something. That changer is running faster than my micromatics did. No, not the platter speed, but the 'automatique' as we used to say.
The micromatics of this era are a bit beyond my ken, but you might want to check if there aren't two idler pulleys under the platter if there are, then one of them is for the changer mechanism. You can reset that one down from 45rpm (which it seems to be running at) to 33. That tonearm is hitting the records a bit harder than I remember...and the set down of the tone arm is too brisk.
Just an idea - it may have run down on its spindle, you might have accidently lowered it - or some kid thought the super double clutch shift was 'groovy'. I know I experimented. (16 rpm was really weird).