I have read many of the center mounting posts have still have one question: Which Center Mount is best?
A true center mount would be measure tip to tail, find the dead center, and have the center line under your boot mounted right over that spot. On most skis this will give you more tail and less tip, but the center of your foot would be dead center on the skis.
A cosmetic center mount, which actually is not a center mount, would be to have an equal tip and tail, resulting in being back from center.
Many people talk about how center mounting is good because it balances your swing weight, making spinning easier. The only way to actually do this is by finding the balance point of the skis with the bindings on them, because the heel piece weighs more than the tail piece this will place the balance point more forward on the ski. This method would give you a perfectly swing weight balanced ski, which is many peoples reasoning for center mounting. Because every companies bindings are different, the balance point will be different with all models.
To really get the balance point, you would want to balance your boots with them too. Good luck trying to do that.