Why bother 3d printing a whole tenting kit when you can get away with something simple quick and cheap? I bought size 000 rubber stoppers, just under an inch tall and half an inch wide, from the hardware store. Then I drilled out the middle to fit the M3 screws used in the Ergodox acrylic case construction, and replaced the screws with slightly longer screws. Finally, I just “screwed” the stoppers onto the bottom. Works pretty well for 10 minutes of labor! Note, I also have rubber feet on the outside corners to ensure the desk doesn’t get scratched by the other screws.