So I got placed playing upper lead this year in the marching band. I usually hate threads like this but I need help. Right now (for marching) I am playing on a bach 5c. I need a mouthpiece to help me play higher longer. I can not play on very shallow mouthpieces because I have large lips. But what I would like to know...is what kind of dimensions of mouthpieces should I try out and it would be cool if anyone could list a few specific cup/backbore/rims from specific companies that would be good? Im thinking I should get a rim with a little bite, to help facilitate buzz when Im tired. And probably a slight funnel shaped cup to speed up my air. I have no idea of what is best when it comes to backbores. (I play on my bach 37 reverse leadpipe). Any words would be greatly appreciated. Thanks!