Good, clear analysis Marcus, if I may say. I find much of the changing technology initially confusing, partlly because it is so often poorly explained - discussions seem to start in the middle, not at the beginning, and terms are used ambiguously. So a relief to see your last post, even if I cannot say if your are correct. The right questions, it seems to me. Perhaps this could form the basis of a Wiki article when all is resolved?

Regards, Locus.