Zebes Mouse

I am trying to figure out how to add trim functionality to the Black Shark. The functionality im speaking about is like a trim hat found on the fixed wing aircraft. I noticed the Mi-24P has this but the KA-50 doesn't. I understand the real Black Shark doesn't have this feature but I would like to mod this into my DCS. I tried just adding the inputs from the other helicopters into the Ka-50 default.lua but this didnt add the functionality. Any advice would be greatly appreciated.