Comment: if you are really hardcore

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In reply to comment: As a CNC Machinist...` (see in situ)

if you are really hardcore

Get David Gingery's Build Your Own Metal Workshop series and build it all from scratch:

1) The Charcoal Foundry
2) The Metal Lathe
3) The Metal Shaper
4) The Milling Machine
5) The Drill Press
6) The Dividing Head
7) The Sheet Metal Brake

Also, printheads for printing metal are coming:
http://reprap.org/wiki/MetalicaRap

"It may be a hundred years before a computer beats humans at Go - maybe even longer. If a reasonably intelligent person learned to play Go, in a few months he could beat all existing computer programs." - Piet Hut