Hello; I love the second machine, it is so wildly, ridiculously, unfeasibly dangerous on every level that it has reached the peak of crazy. Operating it would be like being a WW1 pilot, your life-span measured in hours. Watching someone operate it would be like going to the Coliseum - an amputation is inevitable. The only significant design flaw of machine number two is the lack of a concentric teflon shield to protect the pivot bearing against the influx of blood and other body fluids which can cause rust and clogging. With this modification the machine would be well protected from user error and provide many minutes of function per operator. What I loved about number 2 was when you have a good look at it there was obviously a lot of time effort and materials that went into its construction. I wonder if the guy realised just how incredibly dangerous it would be when he was at the design stage?