Amazing that someone didn't think of this sooner.
Building up of shafts via molten metal powder has been around a long time,only now
they are using it in 3D printing,coupled with a 5 axis milling machine.
This video is absolutely hynoptizing.
http://singularityhub.com/2015/02/25/one-machine-to-rule-them-all-3d-printing-with-german-precision/
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