40mm cooling fan guard cover - spiral and hex blades

I used a thicker version of Prot0typ1cal's base and made my own center sections to fit 40mm Noctua fans. The fan covers with the 16mm cores are made for the 10mm thick Noctua fan and the 23mm cores are made for the 20mm thick fans. The Noctua fans have a slightly recessed fan, so these fan covers are flat on the bottom for easy printing. These will probably work with most other fans too.