Arduino shuttle control - part three

The Arduino Nano PCB is now fully tested and installed within the layout.

 All of this...

...has now been replaced by this:

And there were other components needed in the other boards too, these are also now redundant.

Close-up view of an Arduino Nano:

Video of the Arduino shuttle module being tested:

https://www.youtube.com/watch?v=EmRlLBHKSbw&feature=youtu.be