So at my school we had a brass instructor come in and he told me that I played too much to the right side of my lip. He said that if I fixed it my range, endurance, and tone would be much better. I've been trying for a while to change but whenever I do I basically have to start back to step 1. My tone soulds really airy and I have to struggle to get a G out, I really want to work on it but the music that we play I constantly have to be in the upper range like high Bs and Cs and ect. so I can't find time to do in all around. Can the wise men at TrumpetMaster.com help me out? Please and thank you.