VMR Self-resetting Lever

This piece is a self-resetting lever. A marble comes and hits it and then it resets itself like the name suggests. It uses a weight on one side that is slightly heavier than the other side.

This piece is part of the Vertical Marble Run project:

http://www.thingiverse.com/thing:1357028

A link to the video:

https://youtu.be/LEBWrU4bCfs