Merle, David and I are talking about some ideas for a video, but currently the way I use the XRRs I have, is with 1 or 2 ring terminal rigging points. While I feel that works for me, its not really inline with his recommended specs and I dont feel comfortable promoting that through the TreeStuff brand.
However I actually just received a box of XRRs yesterday, so I will be working up some new projects soon, and while you may not see them on a TechTip, you can always keep an eye on my personal YouTube channel. The problem with videoing XRRs is there isnt much interesting about what I use them for the most, which is my everyday rigging. I find their usefulness, to me, really shines in the normal mundane rigging. Since I dont schedule the jobs, its hard to make the big nasty cracked tree, good weather, good bidding, good jobsite layout, and all the other things needed for a good production, to fall in line to the point where you could show some of the more innovative uses of the XRRs...
Regarding the VSL target, I had it pulled out about 5' from the trunk of the tree maybe? I almost always 'target' the VSL as striking the root flare of a large tree can cause a log round to have a violent reaction which increases the chance of rigging failure.