(re: Duplication) I don’t remember the drawing you are referring to – but, I do remember duplicating disks – by the thousands. Roberta and I copied personally at first, then hired neighborhood kids, then starting hiring lots of people to duplicate disks. It was a MAJOR job. We also wrote programs to read back in the disks, to verify that they were duplicated correctly.
We always talked about outsourcing duplication – but, never did it. We couldn’t replicate the quality or pricing of doing it ourselves.