I got something like this https://www.otto-controls.com/htwm-hall-effect-mini-proportional-output-thumbwheel
Stuck it in between the gap of the warthog throttles, drilled a hole into the throttle handles insides to pass the wires, then drilled another in the bottom of the base get the wires out to the bodnar board. Had to give the wires a lot of extra slack.
Would I do it again? Probably not, to much effort and cost for a functionality thats constantly broken