I agree completely. Is it the Arrow or the Indian ? 90% Indian but you need a straight arrow to be on target ! Prior to the book i knew fin tuning played a roll but felt i would be guessing and opening "Pandora's Box". My year went as follows:
-bought and read the entire book
-measured my ski, fin very close to stock, Front boot too far forward @ 30 1/8,
- open skied 4-5 sets with Video at current settings
- moved Front boot to stock , 29 7/8
- Video of 3 sets of free skiing.
- independent (blinded) feedback of my skiing was " your offside turn is better and your offside stack/position is much better" BOOM.
- Continued video of most of my skiing and micro adjust boot setting when early season course skiing, 29 3/4 too far back.
- After 1 month of course skiing my biggest flaw was "going to the handle too quickly" on my offside ONLY. Reviewed the book looking for the right fix. My observation was that the tip was grabbing on the offside and I was going to the handle quickly to avoid ending up in the water.
- Followed Fin Whispering guide, reduced LE by X, FL by 2/3 of X, DFT by 1/3 of X.
- Next set ran straight up the line and backsided 4 ball at 32 off, too excited. My spotter was in the boat for the 1st time this year and stated " Man, is that ski turning on the offside !" BOOM.
I have obsessively read almost everything once, maybe twice on skiing technique over the last 4 years and have been patiently and methodically rebuilding my skiing. The Fin Whisper knowledge and adjustments have resulted in symmetrical body position (stack) on both sides, onside turn that feels like magic and a consistent and confident offside.
I won't regret the time spent learning more.