My dad and i upgrade from a JD 9500 to a CIH 2366. We absoultuely love the change. We also traded heads but kept them the same size. If i remember correctly, the 9500 and 2366 have very simularly sized engines. Even running the same headers, we gained slightly more capacity in corn and wheat, and probably double the capacity in soybeans. In addition, the grain loss and quality is much, much better than the 9500. Very pleased with the combine. Not much more to say that isn't covered by stewart7225 in the timeline you asked for.