I think I counted 33 steps to make a perfect turn. Really? Who can actually do this?
Picking a couple of nits:
--While technically accurate, pronate or supinate usually describes a position. Inversion or eversion always describes an action that puts one into the supinated or pronated position, respectively.
--Dorsiflexion to get more angle in the ankles is a weak movement. It works when one is close to their desired position and knows what they're doing. Pulling back with the strong hamstring muscles is quicker and has more power when one needs greater movement.
--When I look at the calcaneous bone, it is the heel bone that arches from the back of the heel to under the ankle bones. I don't understand the description.
--I learned the "start each turn..." sequence years ago as part of a different system. "Drive the new outside foot forward toward the tips"??? Drive the foot forward is exactly pushing the body back.
--Establishing immediate grip with the new outside ski is easily done without the stated movements by simply rolling it onto edge and allowing it to ski away from the body without any drive or push. Grip comes from the angles, not from the drive or push.
There's lots more to comment on, and I won't. This whole thing seems like someone complexified (I made up that word) just to, well, complexify it. There is a simple, efficient, elegant, quick way to accomplish the same thing that has been taught for years. Ski like the Schlopy drill in this video with the hands doing normal pole plants with minimal arm swing.