I have been working with the panel for some weeks now, sorted out a couple of electrical issues. Played with it enough to realize that while my basic idea was sound, some of the LED placements were suboptimal. Essentially I had been struggling with how to signal the thing -- on a layout this small probably overkill but it did provide some measure of idiot-proofing for areas that were obscured from the command location. Anyhow, it has been fun and is starting to make some sort of sense.

But the panel... essentially, three bicolor LEDs needed to be moved to other locations on the board. LEDs were anchored to the prototype board with a touch of solder on two legs. So I first had to unwrap the connections, marking the wires to make it easier. Unsolder the LEDs and push them through, move to their new locations and re-wrap the connections. Pretty trivial, really. For these low current applications, wire-wrap is so simple.

In the picture below the rows of header pins that make the ribbon cable connections are the rows of silver points. The wire is wrapped around the short end and pushed through the prototype board hole -- then run across the back and wrapped around the LED pin (cut to < 1cm).

The blue LEDs are occupancy detection, the 5mm yellow reverse running sections (there are two), the row of 4 5mm white LEDs (actually bicolor) are PM42 zone status indicators, remaining 5mm white are signals. And the 3mm yellow and green LEDs are of course turnout positions.

The backside of the panel shows the wirewrap connections. RIbbon cable plugs cap the header pins.