A replacement for the mainboard housing for the  Ender 3 that allows you to keep all electronics in a single box cooled with a single 120mm fan. It will house the standard mainboard, a raspberry pi 2 (feel free to remix for a rpi3) and a buck converter for the 120mm fan. And it's way, way quieter than the stock 40mm and 50mm fans it replaces.
It's designed with two layers, the lower to house the psu, buck converter and the power socket and the next layer for the mainboard and raspberry pi. The 120mm fan is mounted with screw less adapters and can be popped off easily to access the mainboard and rpi.
I have tried to use as much original hardware and screws as possible. You just need to add five standard pc case screws.
Just print each part out and screw it together. go from the bottom layer, then middle layer, mount the adapters on the fan and then place the fan on top. Lastly, remove the screen from the stock mount and screw it in to the top cover.

Ender control box that will fit all the electronics.
Ideas and feedback are welcome. :D
Enjoy!
Update:
04 Jan 2021:
added a frame to mount the C3D 1.1.3 board and other bords with the same layout
touch upon the design -> better printable
07 Jan 2021:
added mounting points for two additional components [30 mm x 16 mm] on the left side cover  
22 Mar 2021:
widened the PSU tray
added continues rail for better customizable future parts
adjusted the angle of the LCD screen (from 115° to 111,5°)
redesigned the circuit board for the SKR 1.4 and SKR MINI E3 (C3D_v.1.1.3 )
widened the port on the left panel for better access
Parts needed for this Project:
Parts you already have:
1 x LCD screen:
Cerality3D LCD (recomended: BTT TFT35 v3.0)
1 x Motherboard:
Cerality3D V1.1.3 (recomended: BTT SKR v1.4)
1 x  Ender 3 LCD mount
1 x 60mm x 60mm x 15mm fan
1 x 40mm x 40mm x 10mm fan
Fans:
3 x 60mm x 60mm x 15mm fan (recomended: 1 x fan in IO shield)
Wires:
Motor/Stepper:
1x 4 pin X-Axis Cable Stepper Motor
1x 2 pin X-Axis…