It's the fastest, and most energy efficient way to rig a conifer, or similar single stemmed tree....hands down.
Watch the other vid I put out previous to this. The economy of effort and time is very apparent. Just me and one other guy. The tree had to be rigged because of stuff underneath, no way around it. So, to rig the limbs conventional style Darrell (groundworker) has to lower each limb to the bottom of the tree, lay it out somewhere, then cut it up, and then make a couple journeys at least dragging the branches to the burn-pile....or could easily be a chipper on a different site. It becomes a 5-10 minute turn around per limb, if he's works hard....less time as we get into the small stuff past 100 ft. Meanwhile I'm redundant for long periods, waiting. That set-up needs 2 groundworker to realistically keep me busy. It'd be tedious, and I'd probably price my self out of the job with such a wasteful and time consuming strategy.
The zipline is probably one limb per minute on average, once we're set up. Darren doesn't waste any time or energy because the limbs are delivered right to him, over the targets, facing the right way. Large and small, it doesn't matter. No need for a 3rd guy. No sawing, no dragging, simple hardware.
Why would you want to spend time going from A to B to C, when you can skip B altogether, effortlessly ? Is that too boring, Paul ?
The logic is so obvious. Mystique doesn't come into it.
What I tried to convey in the video, is that there are measures you can take to make the job safer by a margin or two.
You should get on to that. By the looks of the fauna out there I'd bet it's a technique thatd lend itself well. It's gonna happen anyway. In your shoes I'd rather be the pioneer than not.
Adam, we usually tension by hand. Occasionally a 2:1, but not often.