Boy did you post at the right time . the controllers are assembled with anough clearance on shafts on the pots. Wippers are damaged when you move controls. My RF never has worked rite since I got it . So today I took it appart , took pots appart and put lite weight spring on back side to hold pressure on wipper platte. Works better know than it ever hass. Clean holes in gimbles so that pot shafts slide infree.
This is not for some on that does not know what they are doing could ruin controler. This also affects the wall paper, and stoped the jitters. am going to order new pot since out off warrenty.
GOOD LUCK