Steven, I contacted you several weeks ago and asked what kind of mouthpiece you would recommend for my new Yamaha 321S. I'm almost 65 years old and started playing again about 3 years ago after a 40 year break. I was using a Bach 6.5 AL, and you recommended an SMB4, which I ordered through euphonium.net online sales. I've been playing with it for a little over a week and absolutely love it. It seems that every aspect of my playing has improved, and in particular I get a much better tone (actually a better sound). So, I just wanted to sincerely say "thank you" for your help.