Models & parts for Ultimaker 2 Aluminum Extrusion 3D printer

Re-designed parts and added parts from http://www.thingiverse.com/thing:811271

The length of the Alu.2020 extrusions are in this case 4x450mm, 6x334mm, 6x351mm
The rest BOM wil follow.

For build foto's and pics see; http://www.thingiverse.com/make:236961
For the attached Twin-Spoolholder see; https://www.thingiverse.com/thing:1674950