Main extruder for ULTIMAKER 3D PRINTER

This is an Extruder update for the ULTIMAKER, it's used in a Chinese open source ULTIMAKER 3DPRINTER.

I drew the parts in CAD to be able to see the final design before assembling it.

this is the video

http://www.youtube.com/watch?v=JCOGZniOWl0&feature=youtu.be