i am calling you an idiot, not because of the mounting reference, but the fact that you know nothing about how bindings can adjust. Bambam is a shop tech and knows his shit.
on a different note, the anthems are meant to be mounted at the recommended line, which is 5mm back from dead center. NOT true center. the thing is, most people are too damn dumb to measure out which end is meant to be the tip and which is supposed to be the tail. i would go so far to say that half the people on anthems are riding them a bit forward mounting. that 5mm back accounts for the forward lean of ski boots, putting your center of gravity right over dead center of the ski. people riding them backwards have their center of gravity a cm forward of center resulting in a difference in the performance of the ski. though it may be a minor detail, it is one that almost everyone overlooks.