As with the original, print it on it's back, the chamfer removes the issues with the sharp overhand.
For the lid, there are strange artifacts that show up in the “N” (at least in Orca slicer) unless you disable the “Only one wall on top surfaces” setting.
I have encountered this with other models and am unsure how to fix it in the model. If you know, leave a comment!
The author remixed this model.
The original idea and design are excellent, but I needed a box that would fit 4 cards, so I increased the depth. Now it fits up to 5 cards in standard Ultra Pro Toploaders.
After printing the original model, I figured it would print better and still function if I added chamfers to the overhang and lid. It works well straight off the print bed and has plenty of friction to hold well during shipping.