After reading the rest of the thread....my $0.02.
Loving that 1.75mm Zing it. As for knots, a rolling hitch with four on the support side and two on the load side (Call it a "doubled rolling hitch" if you want") will hold with Zing it under load and allows you to tie then tighten. it also allows for easy adjustment without unwrapping. It will not hold with the "book version" of the rolling hitch (tautline hitch also is a name for it) without the extra wraps due to line slickness, at least as I have found. Also, if you don't tie the knot just right, same issue. Paracord and reflective 3M cord is forgiving in that regard.
That said, the hardware is nice if you are a hardware lash kind of person rather than a knot person or a whoopie person. Personally, my ridgeline for my Cooke Tundra Tarp is a 30' length of zing it with whoopies on either end that are connected to mini biners. Gives me a ridgeline for the tarp, it's a 10x14 tarp, so I have 10 under the tarp, 3 to a tree either side, and 3 back to the tarp, and 3 to go round the tree figuring 18". The whoopies are 10' loops allowing me to choke it all the way down to tarp width. It's a heavier system obviously, one I use for canoe camping where the water carries the load for the majority of the journey, but it's very nice.
Hammock I use primarily is a Clark with the new attachment, so I'm not stringing a separate tarp line as their system just works and I don't feel inclined to try to tune it in any particular fashion.
That said, being more a knot guy, the advantage of this type of connection shown here, to me, lies in the take down. I an make something structurally similar with knots that's not much more effort. Takedown would be far more involved than this, though. It's easier as to get an adjustable knot to hold you have to make it tight enough to be a pain to get back out. You don't have to use Prusiks, though that's also an option, and it allows the additional force to tighten when you're not using a continuous ridgeline as I am doing.