This problem does happen mostly on older guitars be it MSA, Shobud, Emmons etc, more so on side mounted ones , and as these guitars are significantly older have therefore lots more use on them, also one of main reasons is rough use of pedals. The older MSA you Guys refer to bear little resemblance to the modern MSA ( same name different company),the materials and build quality and design are in different leagues.For those of you who don’t know MSA is owned by Micro Space Industries, who mainly supply top of range components to Aircraft Manufacturers, NASA, US Government, as well as top end medical supplies such as joints valves etc. Until I visited the factory I had little idea of how much work goes into them, as is probably the same for many of the present day manufacturers, both materials and design have come on greatly.
These connectors have been around from the Year dot, before I Ever had a steel I remember seeing them used on the accelerator linkage on Jaguar cars and on most marine engines ( where I picked up my spares )
I’ve got to admit the thought of one shearing off at a gig gives me nightmares

especially if it shears off flush with nothing to grip to get it out. Remember guys it helps not to mash the pedals, treat them gently and hopefully you will not experience the problem.