The headsight system uses 2,3, or 4 sensors that hang from the snouts. When you raise the right sensor the headsight "box" gives a signal to the combine telling it the 1 raise the feeder and 2 to tilt the tracker. With the Case-IH system the center sensor just does the feeder up and down only and the outside two do tracker only!! So the headsight is a much better system in my opinion. I think that if you do a search on "headsight" you will find out how to get it. What model combine do you haveIJ