Fan for Craftbot extruder motor

To cool down the gear wheel of the extruder, I designed a fan housing for its stepper motor.
If you want to print flexible material like TPE, the gear-wheel must not heat up!
With this fan and the filament guide from "Scottbee", Craftbot works with TPE.

The holes are sized to cut M3 thread. Screw the printed parts to a 12V fan 40x40x11mm and clip it to the stepper motor.
I connet the fan parallel to the extruder fan. (Your choice...)