My take on a simple mainboard fancover for the Ender 3 V2. Fast and easy to print with no supports needed. It's 1mm thick but works fine. I fixed the 80x80x25 fan with 4 nuts and bolts, but you could also screw some screws directly into the plastic (Other STL file) Modify it as much as you like, Fusion360 file included. You will need "extention legs" for your ender, find them here (not my design)