Just want to confirm that the servo circuit (3+ shield) is a separate cable group from the sensor (2+ shield) cable group. Servo and sensor are not carried inside the same shield.
The shield bare drain wire is typically connected only on the controller and left open (unconnected) at the dish end.
AJAK did not use anything but a reed switch. The only optical one I know of is Titanium's and I built that sensor. But if you need an improved reed style sensor, I got em