I recently did a print that required more cooling than normal. Not wanting to use a desk fan I decided that I would have to make up something to do the job. Photo below of the fan thing cooling a problem print. and a photo of the business end
A small feature that I am quite pleased with is the use of a narrow but deep groove to hold the wires for the fans. The printing 'flash' allows the wired to be pushed in and then helps to hold them.
Thingiverse files, including a PDF with a diagram of the wire routing are at [
www.thingiverse.com]
Mike