Have a well used M8 that on occasion sticks very slightly of center. Should probably get a new radio but I like my M8. I put a little light oil on the bearing and tuned the tension up, but its still there. I'm guessing a bad bearing or worn out pot. Any other ideas? Thanks.

Took it apart to clean the bearing and found the tension screw was backed WAY out. Turned it in about 1/4 inch. problem solved.