Modular NES Cartridge Storage

I've been needing something to store my NES games in so I designed this modular system. You can print as many as you need and snap them together as high as you need to. To reduce plastic I added holes in each layer that mimic the grey rectangles on the NES controller. I've also designed a cut out so that the games can be easily removed. It was designed so that the games fit snuggly so that they don't slide out. I've also included a lid that snaps on to the upper most game slot. This isn't necessary but I prefer to have it. I've also designed the lid with a scene from Super Mario Bros level 1. I scaled up the holder vertically by 1 mm. The older 5 screw NES cartridges seem to be a bit thicker than the newer 3 screw carts.