Load and Unload Filament

This is a "print" file that will load and unload filament in/from your extruder. This is especially useful for flexible filaments that can't be loaded by hand. Also for the [Flexion Extruder](https://www.flexionextruder.com "Flexible filament extruder"). which doesn't allow easy tension removal.

The file only works with gcode printers, such as the Wanhao Duplicator i3. It does not work with Replicator-style like the Flashforge Creator Pro (but those printers have built-in load/unload function