Thanks for this, Haata. I, too, am an engineer, and I was kind of shocked when I first got into mechanical keyboards. I expected some decently documented force/actuation curves for most switches, and had a hell of a time finding anything but cherry. It's likely that a lot of the switches people here enjoy are long-out-of-production Alps switches which went away before the internet era, and therefore lost their technical documents to the mists of time.