Here is the updated Lady Blue wiring diagram as I mounted in 2022 the following pickups:
A DiMarzio Chopper DP184 in the neck positionA Seymour Duncan Hot Stack STK-2N in the middle positionA DiMarzio Tone Zone S DP189 in the bridge position
I also added a general split inverter to split only the neck and bridge pickups simultaneously. I could have implemented TWO separate split inverters, but with my experience, I don't very often split one pickup and not the other one. Furthermore, I want to limit the complexity of this guitar...