A little over two years ago, I tried to build a prosthetic tail. I had four months, and after two false starts and a final result that didn't move properly, i was left dejected and depressed. I made a number of mistakes, all of which could have been averted if I'd just watched this video. From materials issues with the cables I'd used to pulley design, watching this video answered every question I'd had and then some. I wish I'd bought this video on DVD back then, because that tail would have been 1000% better. In just under three hours, you can learn from a master how to build any sort of tentacle mechanism. He even shows how to build a rudimentary pulley controller. From this video, I'm inspired to fix my old project, rebuild it, and make it work the way it always should have.