The beginnings of a slider

I've been thinking about making a slider recently. If you don't know, a slider allows you to create very dramatic time lapse videos or scene setting videos with just a small amount of movement in them so that there is more visual interest. Olivia over on Youtube has an example of a relatively expensive, albeit well made slider and what it can do here:

She shows samples of how to manually push or pull the slider, however, I want to automate/motorize mine so that I can do time lapse videos such as this:

It all starts with a railing, a roller bearing and of course, a motor of some sort. I looked around a bit and found this motor. It's a motor from a car's ventilation system. It's very small, very slow (5rpm) and it's simple to power (12VDC). It's also geared so it should be easy to have it attach to a pulley of some sort.

http://www.allelectronics.com/make-a-store/item/DCM-276/5-RPM-GEAR-MOTOR-12VDC/1.html

More later,
Ambrose