Thanks, Bill S.
I do keep checking from time to time but have nothing new to report as yet. Time is much more taken up in caring for my wife, of late, and although I have a few ideas germinating, none yet complete.
There are flaws in my theory and flaws in the existing theory. The choice seems to come down to philosophy, in my opinion. I will return when I have something definite to add. Dave.
Dave Proffitt