I was very tempted to use FC/FC in Round #4, but after trying it in practice mode (even with easy pin positions), it just didn't seem to be fair.
The greens at Pinehurst are large, but with FC/FC and even MC/FC they're only about half their size. Almost every hole has a fall off on one ore more sides. Playing the course is frustrating.
I did use MC/FC for the last two rounds because it is the U. S. Open after all.