I built a guitar (bought a LP body and the electronics) and wired everything in it myself. However, There is a strange buzzing that stops when I touch the tailpiece (or any metal when the strings are on it). This doesn't seem to be normal buzz though; it only occurs when the volume for the selected pickup (they are humbuckers) is under a certain point (around 9) and the buzz gets louder as you turn the tone up. what is the cause of this buzz, and does anybody have any suggestions on how to fix it?
P.S. I have used multiple amps, and every one buzzes when the guitar is plugged in.