Just to add to the “don’t need spad” thing …
I have never used spad and all 6 of my FIPs and my radio and multi panel work just fine (I don’t use the switch panel).
The only important thing is that the “LogiMicrosoftFlightSimulator.exe” must be run with the run and force commands/arguments ( --run and --force in the shortcut’s target box).
You may have to run it AFTER loading the sim - for some reason that is occasionally necessary. ¯_(ツ)_/¯
Good luck.
