Fan for Nema

So bought and setup another printer... a Prusa i3. Seems this extruder runs sooo much hotter than my hack printer so quickly knocked together a fan shroud to run a 30mm fan against the motor.
When you print, keep an eye out for thin walls.
This is designed to fit a 30mm fan and just slip over the back of the extruder motor (using a charlestruder) for any extruder where the back of the motor is fully exposed.
Fits Nema 17.
Air hits the motor and is then distributed along the sides of the motor. Should make a big difference. Still busy printing my first one so will only know after it's done.