Printrbot Metal Simple Extruder motor fan

I was running into heat issues with the extruder stepper skipping, and while I turned down the voltage, I also created a little mount for a 40mm fan to blow on the extruder. So far, so good! Extruder sits at a cool 28-32C with the fan, and no jams yet.

I kept the fan mount holes small (3mm as I recall), and drilled them out when i received the fan.

The fan is a Noctua, dead quiet, and efficient. (Noctua 40x10mm A-Series Blades with AAO Frame, SSO2 Bearing Premium Retail Cooling Fan NF-A4