I had this same thing come up several months ago, however, in my case the pivot was a bit looser than I like. I grabbed a handful of wrenches and played around until I found which fit. I couldn't tell you the size; never checked. The pivot pin was quite firm, but not immovable - no evidence of lock tight. I reported my success on the forum and Danella was pretty sure I should not being doing that. I kind of got yelled at (metaphoricall of course - it was online). She was certainly right. I should have asked the factory first. However, everything works perfectly.
Jack