In sequence data composed of a plurality of event sets with their execution sequence predefined, each of the event sets includes event data indicative of an event to be executed and trigger data defining timing for executing the event. Preferably, the shelving system is a reverse cantilever shelf mounting system, wherein one or more shelves are supported by and extend rearwardly from an inner face of upright vertical standards. The first positioning section performs positioning of the positioning apparatus. A sealing element pivotally supported along the top andor bottom edge of the door is capable of actuation by a number of the aforementioned battening jacks causing it to be moved into a sealing position along the top andor bottom edge of the door against a contact surface . In this manner, the capacitor may essentially be mounted \u201cupside down\u201d so that some or all of its thickness becomes embedded within the board itself, thereby minimizing the height profile of the capacitor on the board.