This mount is stronger and easier to use than its predecessors. A few of its many useful features are shown below. One example is the declination cam. This allows for easy fine tuning of your declination angle, and it also allows for locking the declination into plate by providing a drill pin hole. Another example is the actuator extension.
Every location requires a different section of the satellite arc to track.
To give every location the maximum amount of satellite tracking arc while not compromising actuator strength, the actuator extension was designed. The surface accuracy is what makes these antennas so useful. We think that the answer is obvious.