DaleB: I became the Northeast Regional Bank Specialist for IBM, because I was so good at repairing 2741s and 1052s, etc, etc. Unlike the other Systems guys, I found the Office Products guru on Selectrics in our area, and had him train me on repairing them. He was a card carrying Wizard. When he was done training me I could rebuild an entire machine belt, tapes, cords, clutch, in 45 minutes. I still have all my tools and a cabinet full of parts. I occasionally get called by IBM to repair the IBM Museum machines (at least 6 years ago they were still calling me). IBM was\is (maybe) still maintaining 2 working copies of every machine they ever sold.