About this 3D model

UPDATE I have not tried it yet, but a derivative of this design has been posted that address some of the minor issues I have encountered with mine. Try it out: http://www.thingiverse.com/thing:413057 This is a spacer that goes below the feed wheel of the RigidBot extruder to support the filament as it feeds into the heater block. This allows printing with soft filaments like NinjaFlex, or helps regular filament load a little better.