Creality Ender3 external controller box

2020-07-16 external controller box modified from Takayuki Mano's to accommodate the stock controller PCB board taken out from the printer frame. My Ender3 printer is in an optional enclosure chamber sold by Creality to print high temp materials. As the ambient temperature inside the enclosure rise high (mine is close to 50 degree Celsius if not ventilate, I fear of the controller board with electronics parts inside exposed to the high temperature causing premature failure.

Requirements
1) four M4x30mm hex wrench bolts
2) 92x92x25mm 24V 0.1A fan
3) four rubber supports
5) five M3x10mm screws (to fix the controller on the backside panel mounting positions)

note: five pcb board mounting poles may break off during the printing. If so, either make the pole thicker or print those poles only by adjusting the print Z height on Cura, and use additional five more screws to mount those poles on the backside panel.