Disclosed is a medicament dispenser having a base unit and a replaceable refill container. In one variation, the implant includes a support member, a proximal retention member, and a distal retention member. Fasteners extend from the rail mounting bracket through the post and into the post insert to provide a strong connection for the mounting of the rail mounting bracket and rail. Other aspects are also described. A video summary is generated based on the computed clusters. A tailgate actuation assembly moves the tailgate between the open and closed positions in response to movement of the ejector between the retracted and extended positions.