We had [this conference](https://gfp.people.uic.edu/ccc2016/) in Chicago in 2016. As I was playing with the laser-cutter and making planetary motion devices, Guido asked if it wouldn't be possible to make two awards for the conference. I also made a [Slide ruler](/article/20170530_cccslider) for that conference. A bit of design, metallic-gold acrylic, flexible metallic with black background acrylic for the tag, and a piece of wood made by a colleague (Jim). I also found that simple M3 or M4 (can’t remember) screws with thin thread will lock perfectly two pieces of acrylic (with a hole cut slightly below the diameter of the screw).