I noticed lately that my first bass a 03 Ibanez GSR200 is starting to so it poor quality and the volume and tone pots are very loose. I have to be very carefull when turning the knobs fearing that everything will come loose. I took of the back plate and the two pots are loose and I thought there would be some loose screws or something in there but there is nothing like that. How do I go about try to tighten these back up?