i just bought a SX fretless bass from RondoMusic and one of the volume knobs is loose. I have had this problem before on my Ibanez bass, but I was able to remove those knobs and tighten the bolt easily enough. With this SX bass, I cannot remove the knob and I cannot find a thin enough wrench to fit in between the the pickup knob and the bass...
Any suggestions on how to fix this will help. Thanks.
I did pry it off put I cannot tighten it. When I pull the knob cover off and tighten the bolt, the knob still turns to quickly. What should I do?
I think what he's saying is the pot shaft turns with virtually no effort. Tightening the retainer nut will not help. I've seen this before with cheaper pots; always seems to be the volume. Here's a quick fix: cut a piece of felt to shape, punch a hole in the center, and slide it over the pot shaft. May take a couple of layers depending on the tolerance. Press the knob firmly back on the shaft. This should provide enough friction against the knob to prevent it from turning freely.
I have a similar problem- I have an MIA Jazz that I bought from a friend earlier this summer, and all the knobs have come loose. 2 of them fell off of their own accord, and the remaining knob (neck pup volume/S1 switch) is so loose that it turns without actually turning the pot shaft, so I can't adjust the volume. I've ordered some plain stainless steel knobs from Warmoth since I don't care about the S1 switch, but I can't seem to pry off the knob on the bass to replace it. Is there any trick to getting an S1 switch knob off or am I simply not putting enough force into it?
Loose volume knob.. 
