This is a PSU cover for the Creality Ender 3 Pro with mounts for 80 mm fan and a LM2596S buck converter inspired by the Voron project.

BOM is as follows (Amazon links are affiliated):

• A 80 mm fan, preferrably a Noctua (https://amzn.to/3sKM9VL)
• An LM2596S buck converter (https://amzn.to/3Ga60AD)
• 4x M3x30 hex wrench bolts (https://amzn.to/46veGfI)
• 4x M3x6 hex wrench bolts (https://amzn.to/46veGfI)
• 8x M3x4x5 heated inserts (https://amzn.to/3MQdXP9)

FreeCAD project file is included for customizations.

Have fun!

P.S: I had 2 PSU's, one that came with my Ender 3 Pro 4 years ago, and the one I just bought, the lower screw hole for these two PSUs were different, and there was a 2 mm offset between the old and new models, otherwise they are exactly the same. My 3D model matches the new PSU model, probably comes with the Ender 3 Pro models for years now… But, better check before printing, worst case, don't bolt the bottom screws as the plastic base holds that part in place already…