Having been a Strat guy forever, I'm not really up on LP quick fixes. My dilemma is that my new Studio's selector switch has become just a little bit loose. Can this be tightened from the outside, or is there a nut in there that can only be accessed from the back? I know this is probably a simple fix, but it's not very obvious to me...Is there a simple way to tighten the switch up? I tried turning it with my fingers, and it actually rotated the whole unit, so Treble was up and Rhythm was down...eeek. Advice would be appreciated.