Moon bases could be made with 3D printers

[willy88]

http://www.space.com/businesstechnology/3-d-printer-moon-base-100416.html

How well would the 'mooncrete' stay pressurized, though? Looks like it could save on building supplies, anyways.

 

[Artlav]

Interesting.
So, someone making RepRap now might be overseeing Moon base constructing in a few decades, hm?