Prusa i3 compact extruder with 40mm fan mount

Extruder is for front or back filament loading. The fan mounts can be mounted on all fan mount on the bottom of the extruder. One is a minimal version the other one is stronger on easier to print without support.
Max. of 4 fans :)

For copyright and source please look at the [source object](http://www.thingiverse.com/thing:80884) from misan.
All the parts were derived from [sgraber github](https://github.com/sgraber/i3ext)