Very interesting, thank you.
MY RG6Q goes braid/foil/braid/foil, and the braids together might give 80% coverage. Either braid layer alone provides quite incomplete coverage. And I don’t know how the foil affects things either. A metal tube has only one layer essentially and since that’s the ideal I want to get it right.
It seems a cable with one layer of well-wound braid would be more “tube-like” than what I have now. Bonito has some neat looking stuff and of course there is LMR400.
Do you know of a book or some other reference that addresses these questions?