I have a Keith Urban Night Star Electric but I wonder something. I have two volume controls and two tone controls. My question is this. It seems that only one volume control is working, because when I put my switch in center position to control the neck and bridge pickups, only one volume control seems to work. I would assume, that if you set the volume on your amp and then adjust each volume control, the volume should change when you turn up the volume on each switch. is it the volume pots or the switch?