Hi steveo3002,
I discovered you post just recently and since I bought a Diamond Select Delorean as well, you gave me a lot of inspiration. Your mods are amaing!!
I am trying to come up with the courage to Dremel down the molded 'wires' on the chasis of my model and fill in the Flux Band groves on the back of the car. I already ended up taking the front stock, solid piece Flux band off and replaced it with my own created 3D printed version, complete with front indicator cutouts and pre made holes for the Flux band holders. I also printed new Flux boxes with Mole Richardson plugs for front, top and rear back. And... will have to see if it works as they are so small, but I created small 'C' clamps for the wiring to the body of the car. These all still need to be painted.
One of the things I did notice on what you are working on, on the front fenders, behind the flux band holders, is that you put the rub-strip back on. I watched the movie again several times and also the Restoration documentary, and there is no rub strip present underneath the boxes, only a small portion behind it. The whole thing was bolted directly to the fender with out indicator lights present.
I am also thinking of putting in a small Arduino Nano board with a switch, to have it turn on running lights and interior lights, Dashboard, the Plutonium indicator, Time Circuits, overhead console and the flux capacitor lights when I want.
Anyhow, keep up the absolute and amazingly fantastic job!! You are an inspiration!