Solid Prime Pillar Required for Mixing Nozzles

[inventabuild]

Hey Jonathan,

Multiple filament lines in / single nozzle out extruders like the e3d Cyclops (http://e3d-online.com/Multi-Extrusion/Cyclops) are becoming more popular. There's no requirement for x,y offsets nor leveling two nozzles when you extrude through a single nozzle.

These type of extruders need to clean themselves out between extruder switches and a solid prime pillar like the kind Cura and Simplify3D offer are one of the best ways to accomplish this.

Please implement solid prime pillars as soon as possible.