Spiral circuits tend to be neglected operationally. The sheer number of spirals and the manual nature of the splitter adjustment means that operators are slow to respond to changes in feed quality. To ensure product quality is consistently met, operators acknowledge they opt to reduce the dense medium cyclone density in a coal coarse circuit. The major benefit the Spiral Galaxy is that it automates the spiral splitters allowing the spiral circuit to be controlled online to respond to changes in feed quality in step with the other circuits, simply because it can be done from the control room by the press of a button.