Wow. I am impressed. (++!) But... damn! A hex slide rule?? (a circular one, at that)

Isn't that like the clearest possible symptom of chronic, near-fatal geekiness? I remember working with the old (straight-edge) slide rules -- it always made me nervous. As for hexadecimal arithmetic, I prefer it over octal, but it still tends to give me a headache.

So if I just try to imagine doing hex arithmetic with a slide rule... I think I'd rather go to a dentist appointment.