Small update.
The side marker lights on the middle compartment are a challenge. The side walls are 2mm thick, so there's not much room for LEDs. Fortunately they just need a small point light.
Broke four drill bits drilling a long 1mm channel for a fiber optic cable in each corner. A tiny 1206 SMD LED is inserted into a hole in the side lighting the back side of the fiber optics. A lot of light is lost doing it this way, but the side markers won't need to be very bright.
The lights are just a small rectangular plastic piece.
