Not exactly related to the HBot but, 3D printing is headed for space.

http://www.dailymail.co.uk/sciencetech/ ... owder.html

 

That's Amazing.
GHB

 

I think that before they send this technology to "space" they're going to need to solve the recycling problem. Sure you can build a wrench or whatever else you need, but there's a strict limit on raw materials, and on storage space. I'll be impressed when they take last week's wrench and turn it in to this week's screwdriver. This is an area where I think the thermoplastic approaches like the HBot and RepRap derivatives have an advantage over the "powder and resin" approach - you can melt down and re-use the material.

At least you will as soon as someone comes up with a way to home-make the filaments to high enough tolerances or we get to an extruder design that can run on pellets.