We recently got a Flashforge Creator Pro at the office, and while we were trying to get it working well with PLA, we stumbled across this.http://www.thingiverse.com/thing:448793 Seems like a great design! We didn't have a 60mm fan, and being too impatient to wait for 2 day shipping, I made this adapter plate. It converts the design to work with dual 40mm fans. You just need some small wood screws and those typical short fan screws and you're all set. The adapter plate is designed so the screws holding the fans on will be countersunk. This ensures a good flush fit onto the cooling duct to minimize air leakage. The design is available in two thicknesses. The thin file is 2.5mm and the other is 5mm thick. We found when using a 20mm thick fan, go with the thin plate to avoid minor crashes. We're always excited to hear feedback, so please leave us comments to tell us what you think!