Cooling fan bracket for Makerfarm Prusa I3V

(To customize this design click on the Open In Customizer link here) This bracket is attached to the left side of stock Makerfarm Prusa i3v extruder and it is used to cool the workpiece layers before printing the next one. This improve printing of pieces with small area layer such as the test STL file attached here. To install attach the fan to the bracket with two M3x12 screws attach the bracket to the left side of the extruder with a M3x20 screw, replacing the existing M2x16 (sticking a tape b