Ok, so I am finishing up a custom p-bass and I need help. This is my first time putting in any pick-ups. I am putting in basslines quarter pounders and have looked at the schematics on the seymour duncan website and followed it exactly but it doesn't work. When ever you touch the tone knob it buzzes and when you turn the knobs they crack eventhough they are new. I can't get any sound from the pick ups. Maybe someone could just explain what to do with the grounds. I was a little confused with that part.