10 years ago I began to receive Medicare. I also took up golf. That began with a community college golf course. The school had a library and some golf books. One of them was "The Golf Swing of the Future", by Mindy Blake. I read the book and enjoyed it but found the swing unnatural and certainly different than what was taught in the golf class. Five years later I found "Golf: The Technique Barrier". About a year ago I gave up on the swing taught in the golf class. I believe that swing is for young people. I began using the Reflex swing from the latter book. It is a great improvement over what I was taught in the golf class, particularly for an older person.
Recently I felt I was having trouble with my leading some position. Eventually I got around to a four finger grip with the leading hand. Remembering the swing in the first book I closed my stance and swung. Everything worked fine and felt natural. In particular, my thumb seemed to be in the right place.
I wonder if anyone else has had a similar experience. Yes, I know, this is backsliding. But for me it seems to work.