I have hold that baby in my hands personally like a lot of Erv's creations, I had the chance to meet Erv several time.
This result come from the fact that not only skilled, but socially intelligent people can do in a teamwork:
that mean, in my humble point of view, that each of these people was able to make his stuff work with another hardware part*
We tend to naturally work alone, because it is faster and easier on our project. Sometime things get that complicated that a teamwork is necessary. This work is a master piece and prove that fine artisan works can going just more far and better than mass industry allows us.
*this is not true for a lot of electronic-for-props, adaptability is the important part of a good engineered system you want to sell, not everybody seem to understand that ;D