With a controller connected to the oval, the left siding never has any power. A second controller can be connected to this siding. The right siding can be controlled by both. One controller can control a train on the oval, the other controls a train shunting the sidings (more points could be added to the right siding). This is an example of "Connecting Multiple Controllers".
| 1 | Basic Oval |
| 1 | x 4515 |
| 2 | x 4531 |