Originally Posted by
CarbonJoe
Loosen the screws for the hinge pin holders, push the arm towards the hinge pin holder and tighten it. Then press the arm towards the other hinge pin holder and tighten it.This prevents the hinge pin holders from tweaking when you tighten them, making them square to the arm. Result: arms move freely.
After installing the arms...tap them lightly with the handle of your driver on the front and rear of the arm near the holder...(something like the Hudy Profi-Tools work well for this as they are plastic and have more weight than the alloy handles)