Summary Update July 23, 2012: Uploaded a more stable version 3 of the fan mounts that are solid between the two screw mounts for the fan. Update May 21, 2012: I don't know why I didn't think of this in the first place, but I've made a version 2 of the previous mounts that print flat on their backs instead of standing up. This gives them a more solid structural support and will hopefully keep them from breaking easily. Update May 16, 2012: I've also uploaded a 20 and a 30 degree angled version (named with the postfix 20d and 30d) of the mount in case you want your fans to aim downward. This is a 40mm fan mount meant to be mounted on the bolt(s) that connect the extruder block to the X-Carriage on the MakerGear Prusa and is meant to be inline with the X tracks. Instructions It is a rather delicate and small part, so be careful when printing. You can print just one to use with a single fan, but my purposes for this was to have an even distribution of fan on either side. I've included an image to better show how this thing is mounted onto the X-Carriage.