I can chime in on this a bit. I have the T-bridge in my WGD. I originally wired it up mono with no preamp and honestly it didn't work out very well. I think you want to use their control-x preamp in the guitar and wire it up to their specs. It really works great with their setup. You get a blended signal that doesn't lose any fidelity in any settings, and also you get the active signal. When it is blended I am pretty sure you are getting an active signal with your passive pickups too. I find myself using the control-x in it's blended position all the time, even with the t-bridge blended out of the signal completely. I don't know exactly how their pre works techincally, but I know I get the best tone out of my DiMarzio's when I run them through the pre. I didn't get a good blended signal before I put in the pre, and the master volume acted funny, sometimes I would get no t-bridge sometimes no mags, depending on which was on first.... Again I don't know why that happened technically, but it didn't work the way I envisioned it when I built. After the pre install, everything worked the way I had intended. I would really recommend you lay down the $90 for the contro-X preamp and you will get alll the versitility you desire, with none of the quirks of not using one. With their setup, you can decide between a mono output of blended signals, or a stereo output with the mags and piezo split, two amps