Batman Fan Guard (Clip-On)

I didn't have screws long enough to attach the fan guard, so I modified the design by @scootnfast so that I could clip it on (batfan_plain). The clip assumes that the rim of the fan is about 4.4-4.5mm thick.
I also needed an air filter, so I uploaded a further modified version (batfan) that has to be used in conjunction with (backfanunderguard) as shown in the pictures. A 0.5mm gap is shown between the black fan guard and the white under guard where the filter material should be clamped.