[KC Jones]

There are two different commands, one is level autopilot, the other is level stabiliser. The one you are looking for is level stabiliser.

Rog Junkers on two different controls in the settings.ini file.

Any idea of what the "Aircraft_Stabilizer" is supposed to do ?

This is (a portion of) what's in my settings.ini file. Yes, I've changed some of my control assignments from default.

Y=Stabilizer [color=yellow]