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' is actually how I came up with it. ' ' you can take my word for it that this is the first time seeing it.' As I was saying just kidding, the other one doesn't have 'tool changer' etc even in the title so it doesn't come up easily in searches, so most people haven't seen it. I know it's there but I still have to find it in my collections, can never remember what words are actually in the title to try and search it.. Just funny they ended up so similar, but not really that surprising these types of tool changer systems are somewhat common in other applications.