Point of detail - what are you using for a Mars Light simulator? Don’t some RCMC boards have outputs for that feature? My only experience is with an early Legacy board (1st run of FEF-3s) where the output just produces a blinker effect; later Legacy has a more realistic effect, about on a par with some dedicated TMCC Mars effect boards.
I’ve used the Ngineering Mars Light simulator for a number of engines - mostly 3rd Rail before Scott started using their products himself. It is highly realistic.