Hello,
concerning the throtte and mixture this is quite easy - i do not think it was in real life, but ...
First i must say i dislike the pre-programmed keys for actin in all of those Microsoft flight simulators as a real pita
!"§$%&/()!!! whatever.
So i just changed the "mine" file settings to my liking, where the key left to #1 on the keyboard is mixture=0, 1 = 10 percent, 2 = 20 etc., and 0 = 100 percent mixture. I do not need those keys for the throttle since i operate this with the lever at the joystick.
As well i assigned two keys to increase or decrease mixture by key strokes - the number changes from plane to plane, so it needs 70 or so strokes from zero to 100 percent mixture in the Fokker EIII, or 120 or so for the Albatros DVa. Nieuport and Camel are also a bit different.
For starting at the aerodrome i press "e" for automatic starting, and give full throttle. When the engine revs a bit higher i apply cut-off for the mixture, and quickly apply 10 or so keystrokes to increase the mixture again. The engine will shortly misfire, and then run perfectly again - and it will now provide full thrust from 0 to 4000 meters. It is very seldom your engine will conk out by itself if you use 10 percent or so mixture all the time.
As well i switched Shift-m to "magneto on", and Ctrl-m to "magneto off". E still start the engine, and ctrl-b switches the "battery" (whatever this means in a WW1 plane) on and off.
For cutting the engine i can either use ctrl-m two times for switching off both magnetoes, or the key left of #1 for cutting mixture altogether.
Greetings,
Catfish