Hi, from a few days I've starting to get ground noise from my p-bass special. The noise comes an goes, and usually it goes away after giving a few small hits to the potentiometers. I removed the pick guard in order to see if some soldering is in bad shape, and everything looks fine. Then I put a cable between the two volume pots and the noise was gone. So soldering a cable between the two potentiometers grounds is this a good idea? Can it do some harm to the bass or the amp? In the original schema http://www.fender.com/support/diagrams/pdf_temp1/basses/0135700_02B/SD0135700_02BPg2.pdf this is not done. Or should I get new pots? Another question? why is needed connecting the mass to the body of the bass (point 18 in the above schema). My bass only has around 1*1 inches of shielding paint, and I measured the resistance between the ground wire and the shielding paint and it was infinitum. Many thanks (and please excuse my bad English).