Try dealing with 50 years of quill stems and handlebars. Modern stuff (threadless stems with faceplates) are easy by comparison.
I'm working on an 1987 Schwinn Circuit. It comes with Cinelli stem and bars. So the quill diameter is standard 22.2 (not French 22.0), but I'd prefer ~1cm shorter reach. The current stem: 115cm quill type with 26.4mm clamp. Yup, Cinelli's 26.4 because, why?
So I'll spend nearly $60 for a particular Cinelli quill stem.... and so it goes. And I'll have to remove the bars and unwrap one side, because quill...