Okay, I recently purchased (came in the mail today) a Marcus Miller Jazz Bass. And the electronics need a major rework. I want to make both of the volume knobs stacked Volume-Tone knobs. What do I need to do to wire this? I am also going to have to do something about the nasty buzz from the treble on the preamp, but passive tone control is first. Help me out. Link to wiring diagram: Marcus Miller Wiring Warning, that wiring diagram is VERY confusing.