I have read a few opinions about this in other threads but I wanted a little more specific information. We have ran s series combine from the beginning and at times we have been frustrated with rotor loss. We have never changed the reverse bar configuration. I just look in the r78 there is no rhyme or reason to where they are located. I am looking for some advice. All we harvest is cereal. Very heavy irrigated wheat and barley. To 20 bu dry land.