Hi everybody, I can't seem to keep my embouchure while I'm playing. It will change shape sometimes to hit or hold a note. I think this may be hurting me alot, because instead of working one embouchure I'm working many. I've been doing long tones lately, which have helped a great deal, but they haven't completely fixed me. What else can I do to get rid of this? More time? I'm kind of interested in Wedge mouthpieces, but I'm not sure I want a mouthpiece to be the answer. If it helps, my embouchure is kind of open and kind of puckered.