SafFire Calibration Piece (Large Accessory)

Calibration piece for the SafFire Laser Engraving System with the Large 3D Printing Accessory (http://saffirelaser.com). Printed in about an hour with 3DM-ABS. Extruded to 100 layers at 75x75mm in ProtoCut; PNG file is in 'Size_Cal.7z'.