Ender 3 Rack Mount Electronics Box

A simple addition to the already excellent electronics box. I have an open frame server rack in which my printer sits on a shelf, and wanted a box that mounted to the rack for ease of access. I've included two versions: a version with the rack ear on the left, and another with the rack ear on the right.

***NOTICE***
Using the left ear rack version will block off access to the USB and SD card ports. There is enough room to fit a cable or adapter to either one of these prior to mounting (which is what I did). If you do not usually run a USB cable or SD card adapter, I STRONGLY SUGGEST USING THE RIGHT MOUNT.

Edit - not sure why the right mount decided to flip 90 degrees. Rotate it in your slicing software so that the bottom faces down. Sorry about that.