Just finished my n64 Cart Case for my Raspberry Pi. To be fair, I did copy this guy; http://imgur.com/a/cqZ1d
It looks a little hacked together but I like the way it turned out. I tried to improve the design by desoldering the almost useless composite video and headphone jack, adding a little window so I could see the status lights, and made the SD card removable without taking apart the case.
Higher Quality Image Here:http://imgur.com/h6Ypipk