Not impressed with the airflow from the factory cooling system on the MP mini? Factory fan failed already? Just print this out as two pieces (first two files) or three pieces (first, third, and fourth files), glue in your blower fan (like this one http://amzn.to/2aMhz3t ) to the fan adapter and screw it or glue it onto the main body. This thing should clip right into place of the stock one with the factory springs. If you have trouble getting the springs to stay on, try and trim a little of the tab off if it doesn't print well or use a file to cut a small slot in the tab so the spring seats securely (i.e. try and make it look like the factory tabs). I am supplying 12V with an external power supply but I see no reason the fan can't be powered internally from the printer. I would say airflow is at least twice as much as before so there is a huge improvement and the added mass of this set-up hasn't appeared to cause any degradation in print quality. I also included the Fusion 360 files so you guys can modify the CAD models easily to fit your fan or if you wanted to adjust the cooling nozzle. Good luck.
Looking to print in ABS? Try this version instead: http://www.thingiverse.com/thing:1688282