Thank you. After some testing, it seems the Saitek driver is somewhat unstable in my case, nothing to do with your mod. Amazingly enough it works very well in the Aerofly FS settings menu, where every switch can be checked, but once the aircraft is loaded the radio panel sometimes remain dark, both with or without your mod.
BTW nothing to do with rpm, you don't idle avgas engines, or you quickly foul the plugs. You always keep some 1'000 rpm when on ground (except for idle check) which is well enough for the alternator to load.
Tonight I could make my radio and switch panels work exactly the same with or without your mod. Except 1 small bug (COM1 standby switches both COM1 and COM2 – nothing to do with your mod, I have the same without), only a few switches in the Cessna 172 can be operated from the panel (mostly lights).
Magnetos key, battery main, alternator, avionics, fuel pump, etc. cannot be operated from the panel, although in Aerofly FS setting menu they are properly assigned and recognized as such by Aerofly FS. Looks like in the mod these switches can be operated with the mouse only... Do you think there is a chance in a next release to have these switches linked to those defined in Aerofly FS Saitek panels menu ?
Thanks again and best regards