 It comprises three manuals and pedals with some sixty-five speaking stops and a great many coupling options that give the instrument a unique flexibility to interchange the stops or sounds available between the manuals.In 1984 the instrument was extensively rebuilt and extended by the South Island Organ Company of Timaru, once again to the specifications designed by Maxwell Fernie and under his careful supervision.During the period following the 1984 rebuild, the organ suffered quite serious water and some rodent damage.