Raspberry Pi 3 40mm fan case

This is a 40mm fan case for Raspberry Pi 2/3, based on the GREAT mount case from giacomo30196.

I have removed every gpio/camera holes and centered the 40mm fan mount and a small hole for my oled gpio cables. I added a simple optional oled pocket that I stick on the side of the case for getting some data.

I have not added legs to make it print fine without supports, but it's recommended to add them for optimal ventilation.

Model doesn't need supports at all.