Modeled after a Buzzon Rogue and a YoYoJam Black Knight (greek to you guys, lol).
All parts are to scale: Response System, Bearing, Axle (threaded), Spacers. Blender Internal, 20 minutes to model, 1 hour and 10 minutes to render at 2000x1800 (I was surfing and chatting in the background though 
Its waiting for a CAD makeover at the moment, if its lucky and doesn’t wobble or vibrate, it will get mass produced for the yoyoing scene. (SHHHHH, DON’T TELL)
(the image links to its full size render, appx 1.4mb)