Changes
/* New parts */
** http://wiki.ultimaker.com/Hot_end_v2 - [https://shop.ultimaker.com/en/parts-and-upgrades/v2-hot-end-upgrade.html 56 Euro]
** http://wiki.ultimaker.com/Knurled_Drive_Bolt_Pack - [https://shop.ultimaker.com/en/parts-and-upgrades/knurled-bolt-kit-version-3.html 16 Euro]
* Self-printer alternatives
** http://www.thingiverse.com/thing:26094 Extruder upgrade
=== Malfonction ===
