Custom Fan Duct Mod
thingiverse
I had problems to fit the original cooling fan on my ender 3 pro.. after a small change it was perfect for me. Maybe it will work for you guys too. .12 layer high with 30% infill (I had 7 walls so I printed without infill at the end) and support do not screw to tight, you will see when it has the right angle.
Download Model from thingiverse
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