Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4744228. The ultimate "cute" and "cool" printer calibration test. Designed to test overhangs, stringing, retraction, bridging, cooling and mid air printing. The z actually has nothing under it. Your printer literally has to try to web out a foundation in semi mid air. Good luck, and please be sure to post a photo of your make. I'd love to see how well all our printers are dialed in out there! Note: The actual design is 25x25x25mm, see how close your printer can get :)