If I had feathers, they would really be ruffled! Just kidding. We set up all of our skis with a fin jig that gets them very close. Then, we use calipers to make sure they are correct. I personally spot check our mounters' work often and they do a very good job! We also feel that the "middle hole" on our plate is where most of our skis should ski well for most skiers out there. While I realize that drives John nuts, the "middle hole" location is derived from testing with different levels of skiers and refers to an actual measurement that is taken from the tail of the ski to the bottom line of stitching at the heel of our Vapor boot. We believe our stock settings work very, very well for a large percentage of skiers and for those who like to tune fins, they certainly can.