and you are wrong,
 please dont give people advice when you dont know what ur talking about
skis, ski switch best at there recomended mounting point, whether that be center, 2cm back, 6 cm back or whatever. the side cut is constructed to help you turn, the further you mount away from the center of the sidecut the more awkwardly the ski will perform, switch or regular.
center mount does have its advantages, but if you want your ski to perform best in all conditions, mount the binding at one of the recommended lines that best suits your riding style, or single the recomended line