Manual steering box question

The area that wears the most is right in the middle. This the position the box is in when the wheels are going straight down the road. If you over adjust the pinion gear ( the screw on top) You wind up with a bind spot. The only way to eliminate this is to take the box apart. You will find a wear spot or a spot where the teeth have a step or wear spot. You have to reface the teeth at this step pot so you can adjust the screw on the top and not have this bind spot.