Need some help from the vast knowledge of TB. Recently picked up a used EBMM Sterling bass. It needs a little TLC, some cleaning, some polishing, some fretwork etc. Needs a setup, I think it could use some fresh strings (although the buyer told me it was new Dean Markley's). So I know how to do all that. I've been around, built, modified, upgraded guitars several times before. But this is my first EBMM. I'm getting some static when I test out the bass. It seems there are some dirty pots, maybe a loose jack connection that needs to be looked at. But my specific issue is when I open the control cover, the preamp is in very tight and doesn't move. So I can't get a look at the jack, or the jack wiring. I can't look at the pots or work to clean them. In order to pull out the preamp and look at what I need to, is it just as simple as de-attaching the pots from the body of the bass, so the preamp will come out as one unit? Thanks. I just do not want to damage anything.