I recently purchased a Wrist Rotate Upgrade (Heavy Duty) Kit with a AL5B arm kit.
My question is about the Ball Bearing and Low Profile Axis Kit LPA-01.
The gear that I received in my kit that goes onto the servo is not as pictured in the instructions, it does not have one side cut out, it is a full gear.
Yes it fits on the the servo, but, there is no way to access the mounting screws on the servo, once the full gear is installed, so that I can adjust the engagement of the gears.
We changed to a full gear a while ago. It makes for a more versatile part. You should be able to adjust the gear mesh by removing and replacing the gear and adjusting the servo position.