I haven't seen this but can't get it out of my head, am picturing using figure-8's along a rigging-line to create friction before the highest anchor-point, literally just string the rope through the 8's (1, 2 or more of them, each lashed to the trunk with a length of rope) in a manner where they're going 'in through the back / out through the front' meaning the weight/force as it hits the trunking would be on the dead-center back-side of the figure-8 (can upload a picture if useful), you could put 2 or 3 figure-8's in-line when setting-up your rigging line so that, when you make the cut, the piece's ability to descend your line is forced through a figure 8 (or 3 of them at spots on the trunk, you could even be directing the line a bit this way, and can't imagine you'd need more than 8-10mm rope for lashing the 8's to the trunking so they stay put at the heights you'd set) Do people do this? If not, why? The biggest worry I have is that adding so much friction to the rope could be bad for the rope, but at the same time I could just spread that load by using extra figure-8's in the system, am picturing using 3 or even 5 figure-8's on the standing leg of the rig-line so that when you cut the top or chunk something large the piece's descent is inherently pulled-through the figure-8's, you'd set a # of figure-8's based on how much friction you wanted to induce of course! Thanks for any advice on this, am guessing it's obvious I've never done much rigging before, am asking this in the spirit of purchasing because I was looking at the portawrap for base and a block for top anchor but then started thinking "why not just use  Figure-8's instead of a block?" as it'd slow descent which seems appealing (at first / when new) and then realized I couldn't think of any reason that 8's wouldn't suffice for the entirety of friction-control here!