50mm blower mounting system - Makergear M2 Z-axis cooler

I needed a compact way to cool my Z-axis stepper motor on my Makergear M2. I'm not sure if I really needed to cool it, but I wanted a way to cool it.

The space available was not that great and I was faced with the prospect of creating a rather elaborate ductwork for a fan mounted off the printer. There are several on Thingiverse, but I wanted something easier.

I was also looking for a fan I could power off a USB hub. That meant 5vdc instead of 12vdc. I found these on Amazon: http: