I ended up going with a design like this AWS ground station, which has two 180 degree range motors.

I'm curious as I ran into the issue when I was instead using one 360 degree azmiuth stepper, and a 180 degree elevation stepper - how do you control that the wiring doesn't get twisted with azimuth rotation, as the elevation stepper has to rotate with the azimuth?

I'm just curious how this is done with real radio telescopes/ground stations.