If you want to cheaply run 4WS on your monster with a 2 ch. radio, this is the perfect solution for you! This 6" servo Y harness with universal style ends will allow you to run 2 servos into a single channel in your receiver.
Note: If you want to have the rear servo turning the opposite direction from the front, you will need to add a servo reverser (sold below) to plug in-line with the rear servo harness.