@MLE_online it's definitely the most groan-inducing regular maintenance issue for me. I think because it is a "I shouldn't ride the bike until I fix it" issue that is simple to fix but involves an aggravating number of steps.
Still beats the hell out of maintaining another sort of vehicle though
@MLE_online in my case it's because I have 27" wheels, but my fenders are for 700c wheels. That and the fact that axle alignment is apparently more of an art on older bike dropouts (this is a 1983 frame).
It's fairly common that I'll get it just right on the bike stand, but then when I go out to ride it, it'll go out of alignment. I've just accepted that for the next half dozen rides I'll probably end up fucking with it a bit.
I do have a 700c set that I want to convert the bike to, but I haven't sourced new long-reach brake calipers yet.