It is unable to turn. It’s rock solid. No movement, not even a µ!
I’d like to adjust the course knob, as it needs — in my opinion — too much force to be turned. A bit less tension would be great.
In all the repair manuals I could find, is an opening mentioned to put a flat bladed screw driver in release the ring. Not so on my modfel. The ring is complete without any holes or grub nuts.
What’s the magic to release the ring?
