Wow! 38 posts already!. Hears my 2 cents and I haven't read them yet. Unless there is a mechanical issue/defect in the mpc. it's you and too much pressure. There could be a physiological issue with your jaw but I doubt it (unless you have spurs on your teeth/gum). http://www.google.com/url?sa=t&rct=j&q=bone%20spurs%20on%20teeth&source=web&cd=2&cad=rja&ved=0CCYQFjAB&url=http%3A%2F%2Findex.healthboards.com%2Fdental%2Fbone-spur-gum%2F1%2F&ei=rWhcUMCYGq3W0gHRh4HgCw&usg=AFQjCNHHKirTf3AKTl2hgi3qFPwMJOptjQ Take a few days off to let the cuts heal.