Quick light design for all of you, who wants to use standard 120mm PC fan to cool your prints (area cooling). No need of supports, no germane overhangs. Fits on 120×120×25mm fans. Just print two pieces with common settings. There are holes for long fan screws, but it will hold even without one (friction).
This mount is especially useful if you use heated bed with PLA, what is a bit deadly combination (code name: overhangs). Fan will be higher than 60mm from the pad (made with Printrbot Simple Metal users in mind).
No special instructions needed. Print it with standard settings (both pieces are identical). Tested with 0.4mm nozzle, 0.2mm layers, 20% infill and Fillamentum 1.75mm PLA.