Just found what I think is the best (at least for me) use for Xtouch’s fader/slider: camera zoom.
I simply set it to increase/decrease “COCKPIT CAMERA ZOOM” variable between 0 and 100 and I now don’t have to reach the mouse wheel or assign any additional buttons on the yoke or whatever.
(the last expression needed to normalize the slider’s 0-127 range to zoom’s 0-100 limits)