Made the end of my 12cc mouthpiece circular again (it was "bent" on one part) acid bath (there was green stuff in the slides ) He did manage to fix this, and then some. I was able to drop it off over the weekend, and pick it up in the middle of the week (3-hour round trip). He's OK for some things, but for certain types of repair, not quite so), but suggested a good person out of town. However, my band director could NOT recommend this person (this is the same person in this thread who loosened all the caps and fixed all the slides, minus the 4th valve tuning slide. Loose valve guide got me to consider seeing our usual repair person in town. If you can't tune the fourth valve, you may as well just view what you have as a 3-valve horn. I use the fourth valve a LOT (at least for several notes), and just wouldn't be able to do that without being able to tune it correctly. It appears that I may be playing a lot more euphonium in the near future (moving from tuba to euph in one band), and so I've been practicing heavily with the euph lately for the first time in a couple of years. In terms of not having a tuneable forth valve section, I doubt that I could live with this for very long. Once the slide is soldered, the player doesn't need to worry about it and he's no worse off than if you tried some other way to plug the leak. To non-techs, solder often seems like a really significant (almost "unreversible" solution), but in fact, it's usually a lot better approach than other alternatives since it's easy to remove and doesn't require constant attention (such as trying to keep a void filled or leak plugged with slide grease or tape). For example, if the slide was leaking (because of a corrosion problem?) or (worse) was stuck AND leaking, then the best way to seal the leak short of replacing parts (which weren't immediately) available would be to solder it at the inner/outer sleeve joint. But I can imagine situations in which (given the wishes of the owner) it might not be completely unreasonable. But why solder it in if it's stuck in the first place?This is a good question.
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