RetroDeck - RPi4 version

This is a quick and dirty remix of the RetroDeck to work with a Raspberry Pi 4.  It's just the bottom pieces - you will need the top pieces from the original model to complete the build.

In addition to modifying the back right section to accommodate a RPi4, I also added a keystone socket in the back left for ethernet.  You will need a keystone coupler and a short patch cable to break out the ethernet connection to the outside.  Something like this: https://smile.amazon.com/VCE-Listed-5-Pack-Keystone-Coupler-White/dp/B0116T7XMQ

I also added a bunch of speed holes in the bottom and skeletonized the internals a bit so it will print faster and use less filament.

After making these modifications I switched gears and decided that I wanted a MiSTer instead, so I never actually printed this.  Everything should fit, but consider it untested because that's what it is.