Just as the 40th birthday of the Commodore PET rolled around I managed to get a Commodore PET 2001 with the itty bitty calculator keyboard and a built-in cassette drive. The cassette drive on my model is some off-the-shelf cassette player that Commodore hacked up with a bandsaw and mounted under the lid of the PET. Old brittle belt Of course being 40 years old the belt on the tape drive had long since become stiff and brittle and broke into pieces when I removed the tape drive from the...