Thank you! For the living hinge, I added it after the fact. With help from the Project tool in Fusion, I got the bounding box for the bend lines onto the flat pattern, and then in Illustrator I just created the hinge from scratch (a short path that I duplicated with the Transform tool to make the lines fit within the box). I’ve thought about switching to Inkscape and its living hinge plugins, but right now I’m just messing around.
For the record, I created a new “sheet metal” material for the 50pt chipboard, setting the thickness to 0.05" and the k-factor to 0.5. I roughly followed this tutorial, and the bend line projection happens at about 10:10 in the video. I used the same gap that Taylor used (0.005") in my design, which is thinner than the roughly 0.008" kerf that the Glowforge produces.