Servos can be used for point motor (or turnout) control, or for controlling semaphore signals. On my layout all of the points are operated by Servos.
These servo controllers require no programming, the servo angle or distance of travel is simply set with trimpots using a screwdriver and the direction can be reversed with a switch.
Servos 8 (4 Servos 2 positions)
Servo 7 (2 servos 2 or 3 Position with speed control)
can now be found at simplyrail.com.au
You will also need a 5v power supply and switches. For the 2 position servo controller ON/ON toggle switch is recommenced (3 pin is fine). For the 3 position servo controller ON/OFF/ON toggle switch is recommenced (3 pin is fine). The switches can be supplied with the controller for $2 each.