Hi Manny- I was just talking to my teacher, and he mentioned that he always does his routine practicing on C trumpet because he plays it on 99% of the work that he's doing. He said that he doesn't know why a lot of players swear by warming up and practicing fundementals on Bb trumpet. I can see his point. So, is there a specific reason people like Mike Sachs, Phil Smith, and many other great players stress the importance of Bb trumpet practice? Thanks!