Open Source Hardware Ring demonstration piece for the SafFire Laser Engraving System with the Small 3D Printing Accessory (http://saffirelaser.com). Printed doubly at 30um with sprue in about 20 hours with 3DM-CAST (also shown with sample ring). DWG is AutoCAD 2004 format (designed in AutoCAD 2005). Designed from scratch with inspiration from DjSplitterPro (http://www.thingiverse.com/thing:358031). SVG manually repaired due to a Slic3r bug.