Reg's device looks like a good, smooth and secure running rig. I like it.
I remember the multiscender device in an article, or ad, in Arbor Age magazine back in the 80s or 90s. The only west coast arbor publication going at the time, and aimed primarily toward the urban landscaper and golf greens guy.
The articles and tips for climbers were pretty weak. But it was the only action in town besides "Logger's World" magazine. Which was a notch-up over Arbor Age.
Finley Hays wrote a monthly column in Logger's World mag called, "The Rigging Shack" Finley was an old school high climber, spur / flipline, hand-chopping, topping and rigging spar poles in the 1920s and 30s in Oregon and Washington. Good old days of steam logging. Finley's memory and wit with story telling, through his 90's, was beyond reproach.
After the 1980s or 90s I never seen or heard of the multiscender again.
Over the last 30 years I have seen a lot of concept/design/engineering go into mechanical and cord friction devices specifically for climber's needs. And each iteration of design, made by different people, qualified people, keeps improving over past designs. Imaging that.
Once, and only once, I tried to descend on a single line of rope using a taught-line hitch.
Take my word, it doesn't work!
Nonetheless, I always thought there could be a way to make it work.
Well, you're looking at it today in the new lineup of mechanical and cord frictions devices available for the modern arborist / climber.
The latest designed by Reg Coates. A working climber.