Can anyone recommend a mouthpiece facing or chamber size for this horn. I use an old Selmer hard rubber on my Couf Tenor, facing(*) size is worn off. I want something that will provide good intonation yet not a real honker on low notes. Something subtle and reasonably easy to blow. I use the horn a lot in church for special and congregational numbers. I don't want to blow the piano player off the platform especially during invitations. Any suggestions from you long time Martin guys would be most appreciated.