http://airtripper.com/255/3d-printer-surgery-2-extruder-upgrade-part-2/?utm_source=rss&utm_medium=rss&utm_campaign=3d-printer-surgery-2-extruder-upgrade-part-2 3D Printer usage and modifications plus Arduino powered electronic projects and 3D Printing designs. Sun, 08 Jun 2014 11:30:05 +0000 hourly 1 http://wordpress.org/?v=3.8.3