Hi - I want to get a volume pedal for use with my upright. My signal chain is currently David Gage Realist pickup -> Fishman ProEQ Platinum pre-amp -> combo amp. What kind of volume pedal will I need, active, passive, high impedance, low impedance etc, and where should it ideally go in my signal chain? The fisman does not have an effects loop BTW, and I'm concerned about a volume pedal interfering with the nice natural sound I have going right now. Anybody use a vol. pedal with a similar setup?