I combined the original lightsaber design by Tagoscha (http://www.thingiverse.com/thing:1768383) with threads from Mike Mattala's NUT JOB (http://www.thingiverse.com/thing:193647), to make a two colour wisdom bearing key chain for my Star Wars loving neighbour.

On a little rolled up fortune cookie-like piece of paper (not in the pictures) inside the handle it said: "Do. Or do not. There is no try".