MK3 40mm Fan Adapter
thingiverse
This is fan mount adapter for MK3 to use 40mm fan like one below: https://www.amazon.com/gp/product/B006ODM76C/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1 Which provied 10+ CFM. I made it to see if it makes difference on cooling.
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