Well, I decided to forgo the panel mounts for the LEDs. I'll secure them in place with a dab of rubber cement or something on the bottom lip.

Here's the new panel graphic:



I finished cutting and drilling the panel's plastic sheets, and installed the switches. A closeup of one section looks like this:



The holes which are NOT punched in the graphic yet are for the LEDs. Each track except the main gets two LEDS near the switches - a blue one to give an at-a-glance indication of which route is selected, and a bi-color (red/green) one to indicate whether that section is occupied (red) or clear (green). The main will not store trains, so it doesn't have occupancy detectors.

Wiring is just barely started:



I plan to work on this each night for the next week or two until it's done.