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I used to be deep into the mechanical keyboards rabbit hole.

On of the nicest switches out there are worn in with time, so I created a machine that wore them in by pressing them multiple times. Never got to finish it but used it quite a bit:

https://www.youtube.com/watch?v=ctWl4Hy6DAc

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For a nice analogue of that: At the Steinway factory they have a machine that breaks in the actions of new instruments, it's a giant eccentric wheel that presses the keys and releases them again once per revolution, they let it sit for a few hours.

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