I just got a 3/4 vintage 4 valve f tuba. Works fine but it has some intonation quirks that could be solved with a slide alignment because they are fairly loose. I was wondering if anyone knows any mod shops in southern California. Preferably around LA, that would be able to add a 5th valve to my instrument. It came with the 5th valve casing but that’s it.
If there are some farther ones that are worth it let me know too. Any info helps!
