I got frustrated with this issue, and made a script in AutoHotKey to fix the trim wheel.
Basically adds 10 keypresses for numpad 1 or numpad 7 for trim up and trim down when you turn the trim wheel → 10x the current trim.
I made it into an .exe file and just run it every time i run MSFS. It works fine for me, and maps pretty well with the trim wheel in the King Air.
I can send it to anyone who wants it, or you can make your own AutoHotkey script. Just copy and paste to your script.
#SingleInstance Force
2Joy22::
Send, {Numpad7 down}
Sleep, 50
Send, {Numpad7 up}
Send, {Numpad7 down}
Sleep, 50
Send, {Numpad7 up}
Send, {Numpad7 down}
Sleep, 50
Send, {Numpad7 up}
Send, {Numpad7 down}
Sleep, 50
Send, {Numpad7 up}
Send, {Numpad7 down}
Sleep, 50
Send, {Numpad7 up}
Send, {Numpad7 down}
Sleep, 50
Send, {Numpad7 up}
Send, {Numpad7 down}
Sleep, 50
Send, {Numpad7 up}
Send, {Numpad7 down}
Sleep, 50
Send, {Numpad7 up}
Send, {Numpad7 down}
Sleep, 50
Send, {Numpad7 up}
Send, {Numpad7 down}
Sleep, 50
Send, {Numpad7 up}
return
2Joy23::
Send, {Numpad1 down}
Sleep, 50
Send, {Numpad1 up}
Send, {Numpad1 down}
Sleep, 50
Send, {Numpad1 up}
Send, {Numpad1 down}
Sleep, 50
Send, {Numpad1 up}
Send, {Numpad1 down}
Sleep, 50
Send, {Numpad1 up}
Send, {Numpad1 down}
Sleep, 50
Send, {Numpad1 up}
Send, {Numpad1 down}
Sleep, 50
Send, {Numpad1 up}
Send, {Numpad1 down}
Sleep, 50
Send, {Numpad1 up}
Send, {Numpad1 down}
Sleep, 50
Send, {Numpad1 up}
Send, {Numpad1 down}
Sleep, 50
Send, {Numpad1 up}
Send, {Numpad1 down}
Sleep, 50
Send, {Numpad1 up}
return
