Posted by Art on January 09, 2001 at 23:39:08:
In Reply to: mouthpiece pressure posted by Ross on January 09, 2001 at 22:28:46:
Don Butterfield and I both had a similar problem (air leakage from the sides)due to the way our teeth grew. Bill Bell advised Don to puff out his cheeks a bit to solve it. I solved my problem by re-shaping the rim of my mouthpiece to fit around my mouth better.