This came up in another thread and it was suggested that it probably merited it own thread.

I am looking at some used SXSs and found a Griffin & Howe/Arrieta on which the thumb screw is not parallel to the barrels. It looks as if it may have been over-tightened. here is a link to the pic. https://drive.google.com/file/d/0B96tMn8CAPu-R1N1REQ2NHJseG8/view?pref=2&pli=1

I really don't know much about hand-detachable locks. Is this over-tightened? Is there an easy fix for that?