Ok brothers, this $20 gadget rocks. I did some testing with this cable knob looking at Orion at 150x and 300x. I went back and forth and back and forth with my slice of wacky noodle donut, zip tie, skinny chip clip and this knob cable. I've been using my wacky noodle donut the past year but you still have to touch the thing which causes more vibration than the zip tie. The zip tie causes less vibes than all the other tricks and gadgets I've tried before but you can't turn it to do course focusing unless you cut the zip tie real short. And no matter what attaches to the knob you still have to reach for it in the dark and almost always knock the bloody thing.
With this knob cable, the thing is right by your chest or stomach with your hand right there not having to reach for anything. No more knocking the scope in the dark! And gently turning or nudging the knob causes no more vibration than the zip tie! And you can turn it completely for course focusing without letting go of it or fiddling with attached gadgets. Also, it stores nicely vertical in a 1.25" eyepiece hole in a tripod eyepiece tray. Is it as slow as a $300 micro focuser? No. But this is the best alternative to a $300 micro focuser I've experienced yet. Hands down.