Basically what I want to accomplish is to have a set of rotating LED's in my case, kind-of like a light show. I was thinking about picking up a low rpm 120mm fan, wiring in a resistor, and then running it off the 5v rail, to make it run real slow, and then putting the LED's at the edges of the blades. If the fan is spinning slow enough, being off balance a little bit shouldn't be an issue, right?