I read Qu as a pun on the character of Q in the James Bond stories who supplies the hero with all sorts of technologically bizarre weapons.
Life imitates art
I've usually seen illustrated and assumed that the procrastinators spun on a vertical axis. This seems intuitive and puts most of the stress on the bottom bearing which can be buttered quickly by the attendant. Night Watch, however, mentions the set Lu-Tze uses in Ankh-Morpork which "look like your grannie's mangle". "Backpack" personal models would need to work in any orientation, so it's the old problem of priorities. --Old Dickens (talk) 01:34, 16 March 2021 (UTC)