35mm Fan Mount for cooling 3D printer ramps board

I designed this 35mm fan mount to clip into the 2020 rail on my Folger Tech Kossel 2020 3D printer. This mounts under the printer to cool the Ramps board. I used M3 bolts I believe they were 20mm long, but you may need longer depending on how deep your fan is. I didn't have to use nuts on the back because the bolts threaded right into the plastic.