MF II The MF II was Maynard Ferguson's first radical change in mouthpiece rim and cup design in over 20 years. Dave Monette worked personally with Maynard to develop the design. The result is an unusually easy-to-play, mainstream (pun intended) lead mouthpiece that has a huge sound. It "slots" almost like a classical mouthpiece! If you have ever tried our classic BL2 design, then imagine the same basic mouthpiece with a bigger sound and larger targets for an even more forgiving, stable response. ...