As I pointed out, with large divisions (60 FPO this time) playing tee times, I want the divisions separated for ratings due to potentially variable weather, especially these wdie open courses. In this case, and in a few other events, FPO has played in significant colder weather (sometimes with frost or snow) when going out first that day.
Changing the course layout name is the only way to automatically produce the proper calculations. In fact, on courses like these, I would prefer the 120 MPO be split into two sequential rating groups, just in case. Then the system would compare the two MPO groups and normally decide to combine them into one group if their group numbers were statistically close enough.