It's always the small ones ...

The lift system was very effective, but we noticed that we would have a problem with the arm jerking when we tried to extend it from neutral position.  Upon closer inspection of the arm we found this:

This small piece of plastic, not even an inch in length or half an inch in width, was the root of all evil ... at least for our arm anyways.  A simple removal of this piece has resulted in optimal performance of the arm and less strain on our lift system.