I play an earlier MK VI bari, and untill recently have been using a Rico Royal B7 graffite mouthpiece. I just got a Berg Larson (hard rubber) 115/1 mouthpiece and every time I use it with my bari I get a stuffy/uneven tone with horible intonation. I know its not the horn, because it plays beautifly with my Rico mouthpiece. I'm planning on taking the Berg Larsen back and trying a new mouthpiece, any suggestions as to what I should try? Are there any mouthpieces that are more compatible with a MK VI than others?