Step 4: Fabrication. Users then send the 3D model files produced by the hub generator to one or more 3D printers in order to manufacture them.
Step 5: Assembly. Users finally manually assemble their structures by following the unique IDs embossed into each hub.
We have validated our system by designing and fabricating tables and chairs, a 2.5 m bridge strong enough to carry a human, a 5 m diameter dome consisting of 512 bottles and a functional boat that seats two.