Oops, I've just picked up a fault in the AE35 unit. It's going to go 100% failure in 72 hours.
From Tech News Daily:
Spacecraft could build themselves or huge space telescopes someday by scavenging materials from space junk or asteroids. That wild vision stems from a modest proposal to use 3D printing technology aboard a tiny satellite to create a much larger structure in space.
The "SpiderFab" project received $100,000 from NASA's Innovative Advanced Concepts program to hammer out a design and figure out whether spacecraft self-construction makes business sense. Practical planning and additional funding could lead to the launch of a 3D-printing test mission within several years.
"We'd like someday to be able to have a spacecraft create itself entirely from scratch, but realistically that's quite a ways out," said Robert Hoyt, CEO and chief scientist of Tethers Unlimited Inc. "That's still science fiction."See also:
Using 3D printers to build spacecraft parts in orbit would offer an easier way to construct huge space antennas or space telescope components 10 or 20 times larger than today's counterparts without having to fold them up and squeeze them inside a rocket — missions could simply launch with the 3D printers and raw materials....MORE
NASA Looks to 3D Printing for Spare Space-Station Parts