A refrigerant system incorporates an expander. In the C-shape configuration, the barriers can close off the bed of a pickup truck such as when the tailgate of the pickup truck is laid out and open. Damage reduction during a crimping sequence includes modifying blades of a crimper, adopting a multi-step crimping sequence, and inflating a supporting balloon to support the scaffold during crimping. A line detector in the camera determines a particular video line of the first video signal into which the location information is to be embedded.