Phantasm : Sentinel Sphere

I made this from scratch using pictures as reference. I borrowed the worm gear model from Johann517's Spider Rover and modified it slightly. You can view the original design at:

http://www.thingiverse.com/thing:468872

This is the famous killer metallic sphere from the 1979 cult movie classic "Phantasm". If you haven't seen this horror film, then you must be living underneath a rock. You will need to print out two blades. The sphere has pre-made slots you can stick the blades into. You