Side Fan mount for 40mm fans

I made this to fit my Prusa i2 3d printer to blow cold air on the copper bell of the budaschnozzle hot end.
This will attach to the x-axis gantry with one M4 screw used for holding the extruder in place.
The hole width for fan is set to 30mm, so it will hold a 40mm fan easily at a 45degree angle.