The fan that came with my Minitronics board has to turn at great speed to cool the board, making it the most noisy part of my printer. That is why I designed this 80mm fan holder. A 80mm fan doesn't have to spin that fast. The minitronics is screwed on top of the board and the fan on the bottom. Use the four standoffs to clear the fan from the plate where you mount the board. The OpenSCAD file is included so you can edit the mount your self. You need the Fan library from http://www.thingiverse.com/thing:18273 for this.