Replying to 07 Tempress Question

The GF just bought some 161 tempress's...She skis everywere not just the park. My sticks are always centered. U think we should mount em -2cm or what. I have no clue whats good for girls. I just dont want em to be mounted hella far back cause thats what the guy at rei was saying hes to old school. So i have to be specific not exact center, maybe core center...idk. She will be throwing some 2 year old 912's ti's on em what do u guys think.