Cheap and cheerful chute turner mod with minimal welding required. If you run past the cable limits you break the cable and get to fix it. I seem to manage this about once a season.
I replaced the hand crank with a short shaft and used a lovejoy coupler to take up any mis-alignment between the hydraulic motor and chute turner shaft. The motor was a spare I had kicking around, you don't need anything fancy or expensive. Slower speed motor is easier to control.
Here's a nice trick - I added UHMW tape I bought off amazon as a UHMW sliding surface to stop ice from binding in the chute rotator. Works better than lube sprays and has lasted 3 season so far.