About this 3D model

Hopefully this will fit most printers. The heat sink mount snaps on and will hold a 30mm fan. A 40mm fan is needed for the duct. Right now I am using this on my RostockMax without stand offs. a couple of nuts are needed to mount the duct fan, I plan on changing this to make it simpler. ***UPDATE*** Version two doesn't require nuts, simply thread the holes to mount. Also, I've lowered the arms to give more clearance for larger fans.