I wanted a way to display my Pokemon games in trios (like they were released). Decided to make a simple display that would work with Gameboy and Gameboy Advance games.
I had a layer shift in my first print so you may see that in the photos. Haven't tried it again but it shouldn't be a problem with the file. My printer is having some minor issues. If you do have issues with this print however, please let me know.
0.2 should be plenty good if you just want to display your cartridges. They should fit perfectly fine. 0.1 will probably give a better finish though if your printer is capable.
Infill could probably be even lower if you wanted. Its footprint is large enough that it's not going to fall over easy, even if it's really light. And just being a display it shouldn't need to be too strong structurally.