I recently attended a special IP seminar on another continent (not cheap).
The feeling was literally jaw dropping for some, for me it was a little more down to earth, but highly entertaining and informative in a way words couldn't ever describe. Overall I walked away with a great deal more understanding than I walked in with. Physical feelings are hard to explain in words, so why bother? Explantains of physiological mechanisms although difficult, can be done to some extent. But that won't help explain the feeling, feelings need to be felt.
Off topic (Much of what you speak of in your aikido practice seems closer to kinomichi, an aikido derivative, quite different to aikido mainstream. Have you heard of kinomichi?
Glad you liked it. Reading of your experience there was also very interesting.
Funny you mention Kinomichi, yes I do know of it. Noro was my teachers teacher. He was very 'direct' in those days. Having seen more up to date videos of his Kinomichi I suppose there could be some similarities, yes. There must be some influence through lineage. Very astute of you Keith.