This is an alternative version of the 4 inch version I have up.

The normal and rounded versions are the same concept as the 4 inch model and I've included an Alternative version for a more piped look.

All of the mounting holes will work with standard 120mm fan mounting screws

Layer height: 0.2-0.3mmNozzle: 0.4mm (0.6-0.8mm*)Shell count: 2-3Top Bottom Layers: 4-5Supports: NoneWalls: 2-3 (I printed mine solid with 5 walls no infill)Fill density: 0-20% (mostly for the bottom plate, increase bottom layers if you want to set to 0%)Print Method: FDMMaterial: PLA, PETG, ABS (Stiff when cool filament recommended)Material Quantity: about 150g (V1) 180g (V2)Print Time: approximately 16 hours with a 0.4mm nozzle

*If you want to use a 0.8mm nozzle, make sure you have adequate cooling, a 0.6 nozzle would be the better option for a print time reduction after my personal testing.