The magnitude of his plans is truly impressive. I would like to know how it is going as well.
I have been working on developing hardware to do the same (for layouts) for exactly the same length of time. The problems are much more complex than they appear if you want to make it all work per the prototypes with CTC included. It is also way more expensive than the original post would imply. The components to make a working system involve a lot more than a processor or an Arduino.