Well I got this Carvin from a Tb'r and I have no idea what does what on this beast. 5 knobs and a toggle switch. I thought the toggle was an active passive type thing, but if I take the battery out there is no signal. Large knob is volume, the other one is pickup. The other three I'm not sure of. 2 of them are notched but the other is'nt. Besides what the heck is the switch for?? It has the single coils in it and Im not sure which model of Carvins they are. ALSo anyone know waht size allen wrench the bridge takes?