francophile 

I mean, you may still be missing something, I know I am. Been looking for my mind for years now and ... wait, what were we talking about?

By the time I got a "real" shop job in the 90s, everything bike boom was a disposable tank costing more to repair than it was worth, I guess maybe that's how I managed to go my entire short-lived career as a wrench without dealing with this situation. There was at least one older guy in the shop that would typically take on the cottered and older bikes and leave the young guys to the newer stuff though. Your bike looks like an 80s model, so I'm surprised I never worked on one similar. Dunno! Maybe another member with a couple of decades of experience than me can chime in.