Really not a fan of bell clamp Lyres for trumpet or mellophone. They are awkward on a baritone because it puts the music so far above the sight line. Only time I like them is if the ring for third valve slide is attached. I hate my trumpets habit of holding the flip folder because they don’t want to spend the time to actually attach it either. The pressure it puts on their lips from not holding the instrument correctly is something I spend all season fighting. That being said. The majority of ours are probably using them because it is the only option.