The dudes over at trumpet herald would probably be of more help to you than SOTW members, unless I'm mistaken and you're not talking about the Brass instrument. If you mean the Bari sax, maybe a nice well padded harness would help with all the jostling around, or you could try (with a knowledgeable person nearby) experimenting with different embouchures (i.e. trying for less pressure to help stop biting on the mouthpiece). If you mean the baritone horn, that might be a little more tricky. I play trumpet with braces, and I used to have a lot of trouble with my lips shredding and using way too much pressure. I guess my main advice for brass troubles is LOTS of long tones every day. I hope this helps, and again, for information on brass playing problems TH is great