Good trim controllers for trimming?

[Voyager]

So, I want to add trim control to my controller setup, for the purposes of trimming the plane*. I'd like to use it with both Il-2:1946 and CoD. I'm experimenting with using the joystick's throttle slider as the elevator trim, but it's seeming to be even harder to get the trim right than with the keyboard. Anyone have any suggestions on what would work for this?

Harry Voyager

*I don't know about anybody else, but I find it rather hilarious that I have to specify that it is specifically for trim control