Trick Maze Cylinder

A trick maze cylinder!

The cylinder has an "entrance" and "exit" for the outer ring on the bottom and top respectively. The challenge is to feed the ring from bottom to top as fast as possible, or to remove the ring from the inner cylinder as fast as possible. Print a few copies and race with your friends!

See the instructions to see how to make the trick version. Note that the non-trick version isn't very hard. If you want a challenging non-trick version that you can actually finish, try one of these:
http://www.thingiverse.com/thing:207662

This is also customizable via the scad version. See the instructions in the scad file. The maze itself is pretty easy, because it's set up for the trick version.

Inspired by:
http://www.thingiverse.com/thing:207662
http://www.thingiverse.com/thing:13923
http://www.thingiverse.com/thing:34193