I have a pair of Volkl Dogens, whenever I lean to nose butter or just lean real hard forward my boots pop out of the heel of my binding. The guys in the shop near me wont adjust the DIN setting because they went by their DIN chart and wont make it any higher for me. Would it be unwise for me to make the setting higher myself to prevent this from happening or do u think my skis r just to stiff and i shouldnt even try to butter? and if I adjust it myself, how much higher should i put the DIN?