I’m gearing up to do so. I have bought a (cheap) watch repair toolkit and a degausser. I have an Amphibia that’s losing about 8 or 9 mins a day that I’m prepared to risk damaging by futzing with it myself, and a second Big Zero where the second hand has fallen off. There’s a local ish guy here who will service just about any old Russian watch, and most,y charges a flat $150 for pretty mush anything (I assume that wouldn’t hold if difficult t9 get it expensive parts are needed) But I’ve rarely spent as much as $150 for one of these, so having a shit at opening/repairing one myself doesn’t seem too much of a risk. I have a list of YouTube videos and blog posts queued up first though…