I won't say how I know because it would reveal too much about what I do in the real world, but this is nothing new, in fact, the proccess dates back to the mid 30's.
There are all sorts of things going on in the machining and manufacturing world that are simply mindboggling. Computer Aid Machining, (CAM), and Computer Aid Design, (CAD), have made it possible to manufacture extremely complicated machine parts in thirs world countrys. Human Beings have very little to do with the entire proccess.
http://www.bing.com/videos/search?q=...ail&FORM=VIRE5
For all of you old Hot Rodders, take a look.