I'm looking at installing a piezo pickup on my fretless Wishbass, and I had designs of cutting it lengthwise - like a hot dog bun - and placing the pickup there, and letting the pressure of the strings on top create the pressure necessary for the pickup to work. A few questions: Am I going to need to get an active preamp for the piezo? Are there certain types of piezo pickups that work well and thrive just as they are? Is there anything special I'll have to do in order to be able to blend this pickup with my magnetic pickup? Is there anything you can think of that I'm not considering? (I've already figured out how I want to get the piezo wire to the electronics cavity.) Thanks in advance, TB - you're the best!