An eighth at the spar pin isn't much at all

hopefully they told you one solution was to slide the butt rib mounts in a little further and re rivet them. You might have to grind the tips off and use new rivet holes but it can be done.

or if its only hitting at the top or bottom, then you have a twist in it that happened when the windshield was attached or when the bottom closeout was done, depending on which way it is twisted.