== Issues to fix ==
* Advices from FabLab Munchen: https://plus.google.com/u/0/118147898615631299121/posts/Kckxn1ssgUt
** http://wiki.ultimaker.com/Upgrade:_Extruder_drive_v2 - 22Euro22 Euro
** http://wiki.ultimaker.com/Hot_end_v2 - 56 Euro
** http://wiki.ultimaker.com/Knurled_Drive_Bolt_Pack - 16 Euro