Folks - took the liberty of reimplementing this keyboard on Keyboard Layout Editor - thought it could be useful for those of you trying to envision your future setup. More importantly, I wanted to see the unit sizing of certain keycaps... like the spacebars!
Z70 on Keyboard Layout Editor
Z70 on Keyboard Layout Editor
https://gist.github.com/tsaiDavid/b2b2ce374a78e8fd2376f015f453fc35