Well... four months since last update... the time flies. Brian Benchoff asked about the new keyboard layout, so here is my quick and dirty "drawing" in LibreOffice Calc.
When Q key is pressed, there is contact on between pins 1 and 6. After pressing J, between 9 and 14. You got the idea.
It is not very likely to obtain the keyboard outside Czech or Slovakia, though Brian got this keyboard in Apex electronics, LA. However, I managed to get my hands on a few pieces of those keyboards, so I'll be able to source it to interested builders, if any.