I put a new (used) clutch in because the old one somehow had the worm 
gear stripped.
Often when it went to the right side and then reverses, it gets stuck 
and just slips.  I went over the rubber stop and the reverse trip 
adjustments and it is working much better, I actually counted and it 
worked properly 100 times in a row.  If I make it change direction 
before it gets to either end, it changes direction no problem at all, ever.
(I hope Ron isn't reading this and knows that I was hitting the 
reversing switch by hand) :)
It was acting up whenever changing from the right side to the other 
direction but the adjustments cured that.  What remains is that if I 
play the last record on the right, A or B side, it then gets stuck 
again.  Pushing the mech quickly to the left will engage the clutch and 
all it well until I select the last selection.
Any ideas?  I'm about ready to tell the customer not to play the last 
selection!  (not really)
Tony