So, I received mine KB TOH last friday, I'm playing with it since then, but one vertical line of keys - Y, H and B is not working. The Y key works sometimes, when I slightly bend the KB plate, but the others don't.
However, I really like this thing and the hinges mechanism, so it can work also as an stand. Really nice work, thanks Dirk.

http://jamar.veska.info/files/jolla/kbdtoh/IMG_2472.JPG