Just get them mounted at the recommended spot. I've never seen much of a point in going in either direction; the skis were designed to be mounted at a certain point, and that's where they'll perform best.
Q: How many NS.com members does it take to answer a simple question?
A: 10. One to answer, three to say 'How fucking stupid are you?', three to say 'This has already been asked a thousand times', and three to say 'Who the fuck cares anyway?'