With the "thousands of hours" being placed into fin design I'm wondering if "Blind testing" has been done. Could be done at almost any lake, on any day and with a small group of skiers. Would be interesting to determine the threshold of adjustment that is needed is to create predicted change in ski performance. I'm sure this would be different for each skill level. Seemingly would be an inexpensive way to validate the principles of fin adjustment that we hold to be true. Also could give some appreciation of placebo effect.