A fence for your Hextraction board! uses M3 hardware to attach sections together, length of the section can be adjusted in fusion 360. Its short, so you won't want to play on hardwood as the balls will bounce out. I recommend a desk/play mat. I used 8 sections, 7 hinges, and 1 end hinge. Print the end hinge at 0.2 layer height to get the snapping to work.