Had a long workout with my Open Sky 2 mouthpiece. My Cannonball Global Series Bi Bell sounds better than ever, and blowing has never been easier, more accurate, in tune and responsive. I have much to learn with it, but I know I will be playing a lot more soprano as a result!I have made really good investment. The review in DOWNBEAT got my interest, and I think it is right about your new addition. Thanks for your quick and professional response.