Reading through the OCAU forums, someone asked how to make a mobile mod for a PC case.
People had ideas of using a servo or a solenoid . Although a solenoid would work, the movement would be very limited.

As I've got afew minutes free and it's too hot to do anything outside, I decided to do a small test using one of my prototype boards. And here it is:-

When The switch is on,the servo moves full left and when the switch is off the servo moves full right.
And here's a short video. Here's the code for a minimum servo board