I think you are missing the point. The point of the video was to show people how the switch was removed. I like to do it in they way its done in the video. I remove the switch then use the tool to unlock and lock the front end when I need to. Its just easier and faster that way for me. I leave the tool in there the whole time and lock/unlock as needed and there is no guess work. Make the tool...dont make the tool. Like with everything its nice to have options.
OK, so I thought I was missing something but you make a good point, all it takes is one mis-step and the tumblers are out of whack. So, the next question is what size copper tubing did you use? and did you simpley just flatten it, it looked like you had some electrical tape on it or something. Also how long is the flattened part?
Getting ready to pull mine and I think I'm going to make one of these.