They control for a lot of factors except, apparently, for gravity. It would be awesome if they scaled their foundry down to the size of a satellite and tested it in orbit.
actually is 1/6th gravity, because you are going to produce it on the moon. I don't know how long the process is but maybe a vomit comet with a different parabola profile to imitate the moon gravity could do the trick.
Yeah, I was thinking that they could launch into a microgravity environment and approximate the Moon's gravity by spinning the sat.
That would be also a good idea, albeit you need to automate the whole process...