Claw with bell crank

***Added 'better bell crank' and 'links only' stl's.

Based on Persona's really cool instructable:
http://www.instructables.com/id/Mechanical-Claw-Ring/

Something about this design really mesmerized me (watch the GIF on the instructable). So I imported it to Skecthup and used it as a template, tweaking in ways I thought the 3-d print would need it.