Jetson Nano - I bought the wrong fan 

I bought a generic case fan.
Cutting corners did not work in this instance.
(I'm sure this is a fine fan for its intended use.)
The 40mm x 40mm x 20mm 5v DC Case Fan pushed air in the wrong direction and had too much vibration.
Switching the positive and negative leads did not change the direction of air flow (in my 1 minute quick test.)
Did not want to spend anymore time on it so upgraded and bought the 4 wire PWM fan on Amazon.
The "correct" fan is in the mail.
www.amazon.com/gp/product/B07...

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