I'm wondering how those of you who play theatres, clubs etc. make sure you're always in tune?
My experience up to now is that you just have to lip up, or more usually down, if you're able to hear a problem, which isn't really a solution. It's not like we can retune between songs like guitarists can. I've found backstage and in the wings can have dramatically different temperatures to what's on stage. Yes, you'd expect the stage to be warmer but I've had times where the temp has been much, much colder than the stage just a few feet away; if you've got your horns there, the tuning is going to be painfully sharp within a couple of minutes of hitting the stage.
I've thought about leaving the horns on stage but that makes warming up before the show impossible unless you take the horns backstage, where the temperature could be massively different, so by the time you go on stage you'll still have the same tuning issues anyway.
Thankfully my Keilwerth doesn't suffer from this temperature tuning issue anywhere near as badly as my old Trevor James did but two years of on-stage tuning issues with the TJ has made me (possibly over) paranoid.