I am trying to get a bit more high end out of the Fender Roscoe Beck. I like the "passiveness" of the bass but I am wondering if I could enhance the shy top end by: - changing the volume pot to 500 ohms. What are the pots on the RB anyway? 250 or 500 ohms? - using a push/pull pot/switch to take the tone and volume pots out of the circuit when needed. I don't want this to be a permanent thing. What pot would I need to do this? Who could describe me the wiring?