Your link to the link you consider to be a good guide to the history of the Technics keyboard is I am afraid old hat and as usual misguided not much history to see just a few pictures from other websites?

Anyone wishing to see a website of a dedicated Technics enthusiast where there is also some good Technics stuff to enjoy then go no further than here http://home.c2i.net/gjgotaas/ the site of Gunnar Jonny

And as for your reason for going over to the Tyros, well Grandpa says it all really quote "Too bad it wasn’t because it sounded better "unquote