Last ditch effort with my JP15 seven string before I post it for sale or trade

I bought this JP15 a few years back. Beautiful looking instrument and flawlessly made. Problem is that I don’t like the sound of it, don’t like the pile of electronics in it that prevent me from trying different pickups, pots and bypassing the (useless for me) boost. As a result I almost never play it. I’m usually not one to sell gear but this one may just have to go unless somebody has any suggestion on how to remove all that circuitry while saving the ability to use the piezo still. Basically an old JP6 situation would probably be better. I don’t even care about stereo outputs. I’d want a different pickup in the bridge (probably a CrunchLab) and the electric side fully passive. No battery required other than for the piezo.