I recently skied with a pro coach and asked him to define the edge change in physicial terms. I had a page full of my thoughts and other notes I had gathered to help me try to improve on my edge change. I ask the coach to read them to see if he agreed with any of these ideas.... well after he read them, he kinda wadded em up and put them in glove box, I could see he was thinking, as he hooked up the rope to the plyon. I'm on platform fixing to drop in water ,...ready for his answer, his quote was''There is no edge change''. I'm like what !!!