An adornment for a post is provided, wherein the adornment is any two of a cap adapted to be disposed at the upper end of a post, a base ring adapted to be disposed around a lower end of a post, and a cap ring adapted for disposition around an upper end of the post below and against the cap, as a modular combination of at least two adornment units. Moreover, the communications system may further include an adaptive polling engine for polling the at least one data storage device for stored messages and providing the polled messages to mobile wireless communications devices of respective users. A control unit that is connected to the detector for the purpose of evaluating a position of the reflected light beam determines a possible deposition error by comparing the position with one of a wafer deposited with its entire surface on the hot or cool plate. The system provides a double action safety interlock that makes the action of connecting and disconnecting battery voltage to and from battery terminals or battery cables separate from the action of covering and uncovering the battery terminals, and so reduces the risk of electrical shock when the battery is being manufactured, installed, serviced, or otherwise handled.