3D Printer - CNC Mill - Big Size

My new open source "CNC Router" Projekt (Mill, Laser, 3D Printer ....) can be download at:
https://grabcad.com/library/cnc-router-mill-laser-3d-print-1

I creat a open source 3D Printer to print big things.
Print size: 400x500x300 mm
You can download the Drawing in PDF and in Inventor 2013 format.
The unwinding drawings are also included.
I take some detail photos for a better understanding.

Youtube Video:
http://youtu.be/M2cmX4ATNfo

A good Homepage where you can get some parts for a 3D Printer
http://openbuildspartstore.com/
http://www.openbuilds.com/builds/3d-printer-big-size.264/

Update 2013.11.28 ---> Upload some details - file
Update 2013.11.29 ---> Extruder drawing in the detail - file
I have buy the Extruder on: https://www.multec.de/index.php?a=379
Update 2014.02.13 ---> New Upload of the "3D Printer (Inventor 2013) - New 1" file! (New: include bearings, screw, nuts .....)
Folder: "Workgroups - NotInProject - 3D Drucker"