50mm Fan holder for Makerfarm Prusa i3

The idea is taken from - http://www.thingiverse.com/thing:29329
The design make in openjscad. It's attached and you can change it as you want. Also I attached the simple extruder plate. So, it's easy to install/remove fan without Z axis Home calibration.

I printed it on 0.3mm layer without supports.