My father had a similar sort of problem with typewriters. He typed throughout most of his life, but on a manual machine (if anybody remembers what that is anymore - or, come to think of it, what a typewriter is). When he decided to make the change to an electric machine he found that his working habits weren't fully compatible with the capabilities of the machine. He was used to typing straight from his thoughts on to the page, and was thus able to rest and think with his hands on the keyboard.

But not on an electric machine. He apparently would put too much weight on his fingers while they were resting. Certainly not enough to press down and type a letter on a manual machine, but enough for the keys to get ahead of him on an electric machine. He trained himself to put less pressure on the keys while resting/thinking by attaching thumbtacks, tack-side up, to the F and J keys. It may have hurt for a while, but soon he'd adjusted to the demands of the new technology.