Hello, I'm thinking about installing an ABS Piezo Bridge on one of my Fretless Jazz Bass Specials. Not sure what that will do to my sound, but I'm hoping for an upright-ish tone, or at least the option of having a similar sound when I want it. The Jazz Bass Special has a Passive P-J pickup configuration, with a pickup selector switch. Will the Piezo work well in a Passive setup, or do I need to install a pre-amp? Thanks in advance for any advice you can give on this. Also, are there any other Piezo Bridges out there, that may fit the Fender bolt pattern? (Looks to me that the ABS requires new holes in the body).