I got a suggestion to try one of these, from a guy I do enough work for, and have done for a while, to give it a shot. Today we were setting trusses with no obvious balance point, (not unusual at all of course, these days) steep pitch, not symmetrical in any way shape or form. The contractor's son doing the rigging, and he's not the sharpest tool in the tool box to start with, and I get a horse throat yelling suggestions from 70' away, I've found it's hard to make myself heard without sounding pissed off, which I'm not. Bored, embarrassed, yes, at times by picking a truss comically out of whack, while other contractors drive by, but after 3 or 4 attempts by the kid I give up and go ahead and swing it. Besides, the next truss will be different anyway...., it's the unrigging that presents the biggest hassle, at least with this particular crew. I almost got offended when he texted me a link to this thing, (I have a hook, but it's smooth, on purpose, so it disengages easily, but I can't use it on a out of whack/unblanced 8/12 truss top chord, unless a 16d nail is driven in the bottom of the top chord to keep it from sliding. I told the kid this, "drive a nail uphill from the hook, to keep the hook from sliding," and he comes back with a nail gun! I don't think he knows what a hammer or a 16 d nail is, if they need one they bust one loose from a gun cartridge. So, at least for this contractor, I'll brown nose him a bit and order it, who knows it might be the cats meow. https://www.trusshook.org/product-page/cam-hook