04-07-2015, 06:16 PM
This may muddy the waters a little but I just took apart the vernier on the 610 I'm working on. Its similar if not identical to Stephen's. It had the ball loose from the shaft just as Stephen's appears in the first photo. After getting all the old grease off and packing with new, I put it back together without affixing the ball to the shaft just to see what would happen and all seems to be working well. Can't explain it but ....