"The majority of the notes are good and behave as expected. i.e. a slow rise of hammer to a 1/16" below string strike with a 1/8" drop with that little bump (what I call the sweet spot) in the feel of the key as you play". This reminded me of an article I read years ago - before the proliferation of the home PC - about some tests that had been done on the tactile qualities of word processor and computer keys. Test subjects all preferred a keyboards where the keys had an "escapement" or "set-off" bump just before they activated the function. Sorry this doesn't answer the regulation question! Best regards, David.
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