The Selectric feel was particularly good in a few ways: - it had a very light pre-pre-travel of a millimetre or so, providing distinct touching-but-not-pressin

The Selectric feel was particularly good in a few ways: - it had a very light pre-pre-travel of a millimetre or so, providing distinct touching-but-not-pressing feedback; - the force drop at the tactile snap point was so high it felt like the keyboard was actively trying to help you type; - the post-travel was long and gradual enough that even an aggressive operator like me wouldn't normally bottom out. IBM beam springs got part of the way by using two springs (one of them two-piece). Another spring or two, or some nonlinear springs, could probably do better.