On my model I will try using Plexi cut to size, drill a hole on rear and put a white LED.
The Plexi was bought as scrap at local dealer, LED´s are 5 for $4. Plexi comes in different sizes, sheets, rods, I use 1" sheet (part of) and cut with bandsaw.
My LED´s are 3,2v 20mA, 2 connected togheter can be runned on reciver battery.
The brass strip will be used as guards outside lamps (on CAT models).
Dan