High Angles,
Welcome to the Real Skiers group and please continue to keep posting. I assume you post on the PMTS forum under the same name, share your real first name as we use actual names in posts quite frequently.
I am the OP of this thread and, very recently did a binding adjustment to move my boots back by about a 1.5 cm on the Kastle 88's. In addition, last week I did some skiing with an instructor (non-PMTS) who had us do some "shuffling feet drills" which convinced me my body position was too far aft. Among my general theories is many ski too far aft or back seat. Part of my proof would be to observe still photo's? of skiers we know that are available on the internet. Fore/aft has been discussed in several threads and my sense is that it changes among the instructional systems. After our little drills last week, I focused on doing a very strong free foot PMTS pullback and that was pretty effective.
I'm off to the Epic Gathering next week to end my season and I've been watching Harald's Performance Free skiing video and making notes about things to work on as I ski. My present thinking is that the issues with an 88 vs a 66 width ski is not as simple as a binding adjustment.
The one thing I am very sure about is as I continue to learn and progress through PMTS, I appreciate that subtle differences change my thinking about individual movements. Perhaps said a different way, overall growth in one part of the system changes the feedback I experience in various parts of the turn. I don't have answers, I have simple insights to how it all comes together in my skiing. Pardon my rambling. The 88's will get a major test starting on Monday with the new video as my bible.