I’ve updated this design to have stronger and better-hidden hinges, more space for art, better use of the space including an extra little storage “basement”, and more!
Link to the drive folder and SVG is here, also linked from a newly-created thread on the “Free Laser Designs” forum. (Mods, my apologies for the duplication; I wasn’t sure which forum was better for a made-on-Glowforge design I was willing to share.)