About this 3D model
If you like me think the provided 40mm fan is a bit to loud, go get a silent 120mm case fan and print this lid. It's a little bit bigger but the 120mm will cool your electronics while keeping almost quite. I used and modified this original file from Lulzbot http://download.lulzbot.com/AO-101/hardware/printed_parts/source/EnclosureLid4.skp