[chipcook]

Quick chime in on the Yamaha 4CM Tenor (Custom). Great all around mouthpiece so far! Comparing to the 4C which I also own, I prefer the ebonite made CM. Perhaps I prefer hard rubber, but it feels more natural and there is a positive difference (slightly) in the air flow.

It is similar to the Selmer S-80 with the square chamber opening (which I have played on soprano).

 

[Andrewplaysax]

The 4CM that I have played in the past was very nice! they are very similar to the S-80s as you said but at a fraction of the price. I own a Yamaha 4C plastic mouthpiece which seems to have an airier sound to it, the 4CM is pretty focused (just like the S-80's). Highly recommend them to budget-minded people that are mainly into classical.