Mouthpiece Question Currently my son plays a trumpet (Bach Strad and Yamaha Student Model) and will be a high school freshman. His Trumpet Tutor says he has Angelina Jolie lips and is starting Baritone too. Friend loaned us a modified mouthpiece last week: Trombone mouthpiece with a cornet shaft. Used an adapter to put the cornet shaft in a bach strad. Mouthpiece was the one John Cress (Trombonist with the Tommy Dorsey Band - used when he played a Cornet) Question will this affect the sound on the strad? Tutor is with the LA Chamber Orchestra and tried a tuner and the notes seem okay. The Trombone mouthpiece allows all of his lips to be in the cup for the first time. My son likes playing the trumpet. Will this affect the sound of the trumpet and make it sound fuller? My friend said that Cress sounded great on the cornet with this mouthpiece.