Originally Posted by
Socket
I would pull the arm off, pull the insert out, and look at the contact point on my bench. I would check to see how far the set screw needs to go to have contact with the hinge pin.
If its not making contact, then I'd drill and tap a larger set screw in it. Or, if needed, go to a longer screw.
This is what I was going to try next or try to find a screw that would work in lieu of the pin.