Tested out the “Glory Box” It can hold a dummy coil, preamp and 9 volt, a tight fit, may have to enlarge the cavity a little bit. Can easily drill a hole for bridge ground or piezo under bridge saddle, or run piezo disc line from main cavity. May keep piezo circuit separate from passive electronics, can get stereo sound, separate output jack, can run stereo. Think I’m leaning towards this way, may need to order some dpdt input jacks to turn on/off. I think that is more practical than an off switch push pull.