I just watched a video of Stanley Clarkes gear and he calls the Microbass II a must have for doublers. He uses Alembic and upright with Underwood pickup, same as me. I understand you can connect two amps with this pedal. Anybody try that, and is there hum or ground problems? I would love to run a couple of combos at once, heh heh. Take that you loud drummers and guitarists! I hope this pedal will work well with the Underwood pickup, I also have a bass with a Realist. (By work well I mean make sound better, obviously it works for Clarke) Stanley on electric often twists a knob between bass solo phrases, doesn't seem to change much, maybe just a habit. I'm not really into effects and pedals and knob twiddling but ... Is this thing a 'must have'?