Clever! ^_^

Was each link made from two pieces, or was there fill material inside that you removed? I'm having trouble seeing how to print these in a makerbot-compatible way (though I could just be overlooking…

Nah. It'd just take a dissolvable support material and higher resolution. There are commercial 3d printers out there that can print ball bearing assemblies in one pass, fully assembled.

Nice! ^_^ I was going to be flabbergasted if you were actually able to print it as a unit, but I guess that would take antigravity.

I printed each piece individually and assembled them after some cleanup. I did print four segments at a time, though, unattached, in a 2x2 grid.