Wow, I'm impressed! First, that you've been able to adjust; second, that's it done consciously, with awareness and intent; and third, that you are able to express it to others. (Why not become a tutor?) BTW, what is your age, please, and how long have you played? Did you overcome an airy tone? Did you ever have any orthodonitics work done? ever wear a Herbst appliance? My student has quite even teeth and normal-looking lips--until he buzzes! Instinctively, he keeps wanting to move the mouthpiece on his mouth, up, down, sideways, or adjust the angle of the horn to his face by tilting his head or dropping the bell, always looking for the "sweet spot" where the buzz and tone are solid. He just can't seem to find it. Maybe it has to do with that little triangular "button" that pops out whenever he buzzes.