So the right shift key on my PC-1 quit working today...
I popped off the keycap and poked suspiciously at the switch and it started working again!
I put they keycap back on and it's working fine! See: ABCDEFGHIJKLMNOPQRSTUVWXYZ!!!
Dispite this glitch I am impressed all over again with the Tauon's keyboard. Not just nice to use, but very well made! That little undersize keycap? Has a wire guide to make sure it goes up and down without binding!!!