Mike.
My posts are a bit of a stream, of consciousness thing.
If you read through them there are loads of inconsistencies and misapprehensions. I started the thread with complete ignorance.

I hope the steady progress shows a gradual illumination on the subject as I became more knowledgeable .

I think it would spoil the content if I were to go back and correct all my mistakes and misunderstandings I have had along the way.
When I do the write up I hope all that will be eliminated.