nmackes shares: This Locking Extruder Handle is a Refined version of my first Printrbot Simple Metal Locking Extruder Handle http://www.thingiverse.com/thing:651391 which locks in both the open position (to feed in new filament) and the closed position (locked down and ready to print). download the files on: http://www.thingiverse.com/thing:724326 Every Thursday is...