This might be a noob question but my trumpet is brand new but I want to take best care of it and do the right thing.
On my 390 there are some o-rings mounted on the 1st and 3rd valve slide. One of them snapped. Can I just replace it with a new one from any hardware store (as long as I find the right size) or can I simply remove the rest of the o-rings ? The mian tuning slide doesn't have any o-rings mounted.
I don't think they have any higher purpose besides protecting the slides when closing them and maybe decrease the sound of the slides closing...