@MikeT David Miller posted here about the binding position and said that the rear must be up to around 17.25. I had my fin back to .695 because at stock DFT my onside turned 110* with a rear boot at 17.00. I also had to tip toe around the offside to avoid wheelies. Sporadically, and without warning, I would get lean locked. Moving DFT back solved those problems for the most part. Because of the hole spacing, I am now at 17 3/8 (from 17.00) with dead stock fin settings. Transformed the ski. I read every thread on here to learn what was working. Moving the rear boot up and resetting to dead stock fin has been the best move yet. With size 10 feet, this is mighty close together ( I want to try 17.25 and will make a plate to get there). Another point he made is that the front should not be ahead of the 28.75 number or the ski will loose speed and just be hard work. Found this to be true too and am at 28 11/16. As to the caliper game, I feel your pain.
Thanks Dave Miller!