machining a custom yoyo

on of my friends works at a shop and can get a yoyo machined for pretty cheap. I’m going back and forth on ideas. what do you think would be a cool (prehaps radical?) shape for a one of a kind (playable) yoyo?

bump

just some goofing around in sketchup

Hey, I suggest trying Alibre.  You get a free trial, then you get a free version which is good enough to make a throw.  http://www.alibre.com/