| GB STM900 loose knob problem...
My STM900 knobs have some decent resistance when the unit is cold or in a cooler environment, but once the unit heats up or if I'm playing in a hot club, the volume knob gets really loosey goosey and will move very, VERY easily.
I was thinking about adding a small rubber o-ring underneath the knob to add some resistance (I've done this on basses before), but I can't even figure out how to get the knobs off.
Anyone else experience this, or does anyone have any suggestions? | 
