I want to move from a Holton MC mouthpiece to a Laskey, but I'm not sure how large to go. 725G? 75G? I have very thin lips and don't want to limit myself with too large a mouthpiece. Even on the Holton MC, the red part of my lips is completely inside the diameter like I don't have lips at all. I'm an amateur adult player getting back into it after years off. Any suggestions?