I liked the design of the honeycomb fan cover I saw, but I wanted it more secure. So I combined it with another design that had wings with holes for the screw. I lowered the inset part so it could fit more snug onto the main board cover.
Printing it right-side up will use more support material, but has a lot nicer finish on top. So I suggest printing it right-side up.
The author marked this model as their own original creation. Imported from Thingiverse.