So impressed with the progress.

When I was a lad I spent 2 and a half days without sleep debugging an intermittent logic problem in an IBM 3033, a machine the size of a room with massive looms of trilead cables running between the frames. I remember the terror of having to do some bodgy fix like the one described when the guys file the notch out of the extender card, while an angry data processing manager a few decades my senior cursed and glowered behind me and the bank's check processing center stood idle. Perhaps the scariest experience of my life.

Hats off to anyone who fixes old computer hardware.