Ender 5 Raspberry Pi 3B+ Enclosure

I relocated my Ender 5's electronics enclosure to the back, using [rsteube's rear mounting brackets](https://www.thingiverse.com/thing:4541329) and then printed his [Raspberry Pi mount](https://www.thingiverse.com/thing:4579858) for inside, so I could run Klipper. Both of them fit beautifully and worked great, until I put the lid back on - my wifi signal had trouble communicating through the metal box, so I needed to relocate it.

I used [ffleurey's Parametric and Customizable Project Enclosure](http://www.thingiverse.com/thing:155001) to make the box and lid I wanted, then added the mounting points, ventilation, etc.

I chose to put it at the inside front of the cube base, so it'd be easily accessible. There are also mounting holes for a 30mm RPi fan and a LM2596 buck converter, in addition to the Pi 3B+ (plenty powerful enough to run Klipper or OctoPrint.) The hole in back (for the power cable to enter) is sized to fit a 5/16" rubber grommet. M3 screws and nuts to keep ever