This is new to me but maybe you have seen
it
A guy pulled an electric steering unit off a car and bought a wiring harness to make it work on his sports car. It could be a hard to tuck one of these units in a cub but there are enough people working on custom stuff that this might still be of interest. Maybe there are smaller units.
They could be used anywhere to amplify the torque on a shaft. No idea how much.
There are also this type
