First, I would like to say well done. Not just the project -- it is neat. I particularly appreciate the fact that it includes all the less obvious, to me, pieces like building appropriate box, sanding and so on. I wish more projects were like this ( as in, showed most of the steps ).
I really enjoy writing these guides for others to learn, it forces me to think more about the process :)
If you liked this one, I've also written another guide where I built a full-size arcade machine from scratch: https://github.com/maxvfischer/DIY-arcade