I guess anyone who still is searching for a haberdashery and has fun with “Euclidean” geometry
should have a flat tappet cam. After all, assuming a small set of intuitively appealing axioms, and deducing many other propositions from these would be the very essence of Euclid himself and would lock that person solidly into a pre-theory of general relativity era. Right where a non-roller type needs to be! You know, ignoring gravitational fields and so forth with the strength of a dino-motor!
