Nema stepper motor cooler: for 40x40mm fans

my bottom stepper motors got pretty hot (about 60°C): this should not be a problem usually but to ensure maximum power out of my Nema stepper I created this fanmount.

Prints easy whithout support!

Mount with a zip-tie! (I used a 3,2mm wide one)!

You'll need:
a 40x40 fan
4 M3 nuts
4 M3x?? screws depending on your height of your fan