[SenorZ]

We used a pot for our shooter last year. We ran the pot to analog input and had code read the value as an angle. The software (which I didn't write or ever see!) would power the motor (a PG-188 I think) forward or backward until the desired angle was read back.

We had settings for vertical, 45deg, 30deg, and I think a couple of others.
They used PID to control the angle and keep it constant because the shooter was not centered and balanced. If your panel is, it might not be hard to position it.