So it’s getting the new pickups, all new CTS/Dimarzio potentiometers, including a push-pull pot for (partial) coil splitting, a 'treble bleed' capacitor, and a Switchcraft switch. I live on an island so I had to order parts and am waiting for them; hopefully they’ll be there this weekend.
It was hard to find an appropriate 25K pot with fine knurling for the Piezo (it’s an active system with a battery, so lower impedance and hence the lower pot value.) So I ordered an amplifier pot - basically the same but with a solid shaft - and will switch the resistor wafers between that and another CTS pot.
Interestingly, two pots are from Alpha and the Piezo pot from China, but they all have 3/8” shafts so I won’t need to enlarge the holes to fit CTS.
I also ordered custom black plastic pickup rings, but they won’t be here for ~5 weeks. I'm also considering buying a set of flamed maple pickup rings, or maybe making a set out of hardwood or plywood and a flamed maple veneer.
So that’s where we’re at: the guitar and I are patiently awaiting parts - well, trying to be patient! Hopefully they’ll be here Saturday.