Ultimaker Syringe Extrusion System (quickmountable)

Features:
* It can be mounted & removed within seconds facilitating the:
Ultimaker Generic HeadMount
http://www.thingiverse.com/thing:20775
* No z buildspace is lost. If you crash the syringe into the build platform it will just slide upward until the z endstop is reached - no damage.

Restrictions:
* springiness of the dyneema thread (preextrusion needed)
* If you have a custom extruder you might be required to redesign the winder coupling part.
* The current design uses
"Ul