I question the function of the "pan handle" to left of the intake window for the LED light. It's in a way of the flash. The manual for the TG-5 says that the flash must be turned off when the LG-1 is attached. It's painted white probably to reduce heating if the flash fires accidentally. I might end up hacking off that [seemingly] unnecessary bit.
Rear cover removed
Rear cover with a window for LED light intake
Front cover with light guide
The clear part that does the actual light guiding