This is the 2nd free downloadable case for the UNO that has been too small for my Chinese Knock-off Uno, so I cant judge the design on that. However, the posts to hold the board are too small and too week to hold the board. I would reserve this functionality for bolts or some form of hardware. Other designs I've seen use small nubs that provide better lateral strength. Port spacing was good, like I said, the chinese knock off was just too long and wide to fit in the above design. After the base did not print, I did not complete the lid. Update: With the post removed, I used a heated knife to notch out the back of the case to make room for the board. Now that the board fits snug, I'm printing the top now Update 2: Top printed flawlessly. I may still need to slot out the back for the ICSP pins, but thats no big deal. Without the posts securing the lid, the port snugness will have to suffice. There is enough leeway to place a hinge on the side, as is, it would require gluing or creating a plastic rivet. ..