Link these units together and make chain-mailLink in the same way as shown here https://www.youtube.com/watch?v=nrl8pAMQ-aM . Useful for using up small bits of feedstock. If you cant get the printed pieces to go together try using a heat-gun to warm them up a bit first. If yours keep coming apart, you can also heat them up and squash the top gap closed to prevent this. On mine I have bent the pieces in the middle, they seem to lay better this way.