Very discouraging middle-of-the-night trial run of the feedback resonator, which barely feeds back, and rattles thinly and badly when it should resonate… it may help to shorten up the connections to the amp and maybe just remove the attenuators… they could be patched into service as knobs with a multiplexer, maybe… four pickups though the wiring somehow seems totally different now. The cardboard membrane sounds really weak until it rattles out of control at weird times (could use a highpass maybe) and the strings respond completely differently.
If I patch the pickups directly into a koma field kit (which is all active/buffered and has extra gain and filters) and then into the amplifier maybe it’ll behave more like it did when I was testing. It just wanted to feed back then… now I wonder if the noise floor is so high that it’s actually suppressing the feedback? Different membranes may help, too. I hope!