yes, definitely contact, sandwiching between the THT and bark. That's why I showed it in slow motion. at least, I hope I did ! Due to the slim profile of the THT, it must limit the pressure of the pinching/ sandwiching a lot. Someone with that belay spool said the pinching on it sucked and locked things up. Look at the thickness. That is the reason I think.
in negative rigging, about a half wrap is added during the inverting process of the THT and also the bark friction at the very end. Very beneficial to putting on the breaks at the end of the run.
You guys are smart. You keep speculating, but also keep saying "I haven't used it, so I don't know for sure". That is talk of a wise person right there.