A printer has a queue for queuing a queued execution command, an immediate execution agent for executing a write command, and a queued execution agent for executing a read command. The part \u201cA\u201d has one end sized to fit the ordinary household Vacuum sweeper. An inner support is rotatable within and with respect to the outer support about a spin axis of the gantry extending substantially normal to the tilt axis. The random access unit information indicates a distance between at least two of the random access frames in bytes.