Modifying a Servo Motor for Continuous Rotation

I am going to show you how to modify a servo motor to allow it to spin around with an unlimited range. Doing so will give you a powerful geared down motor for the cost of a servo. This is the servo I used: http://www.hobbyking.com/hobbyking/store/__2__HXT_10kg_Servo_metal_gear_55g_10kg_16sec.html