Cu\u2014Ni\u2014Si\u2014Co copper alloy strip having excellent balance between strength and electrical conductivity which can prevent the drooping curl is provided. Sandwiched between the two disks is an energy absorbing member or members. In some embodiments, the braking system may further include a sensor and the actuator may be triggered to actuate the pawl gear in response to signals from the sensor. The method includes the step of placing the infant into the car seat so that the infant is surrounded by the cushion base portion and legs to reduce the surface area of the car seat for the infant to occupy in order to help to minimize slouching of the infant in the car seat. Flex tabs lock the head in place. The steering output member, the manual steering mechanism, the pedestal and the auto-pilot drive are accommodated within an outer casing.