Try to answer some of the questions.
born2roam, I tend to always hang under a tarp even if it doesn't look like rain. We can awake down here in Florida with some pretty heavy morning dews. My tarp has braided mason line whoopies attached to each end with S-biners to the tarp loops and could be removed and stuffed back in the bag. Like BearChaser's video shows the tarp can be above or below the SLS.
Moel, the hammock doesn't need whoopies and BearChaser's system used Alpine Butterfly Loops tied in the SLS with the hammock clipped to the ABLs. I just found making my final tweeks easier with the whoopies than undoing the ABLs. Just had a thought! If the 'buried loops' for the hammock were lengthened they could replace the whoopies or ABLs. Something else to try out. As far as the tarp sagging BC shows in the video his use of tarp tensioners to maintain tension on the tarp. When he climbs into his hammock the tarp has very little change and this has been my experience.
Most of us end up poorer here but richer for being here. Olddog, Fulltime hammocker, 365 nights a year.