Bill:
Racing an RC30 PHRF and racing a N5.2 PHRF are two completely different scenarios.
Racing PN is fine. I usually get beat pretty bad racing PN against the local lake guys here because the courses are so short. They tack once and they're on the layline. Doesn't give you enough time to put enough distance on them for the dw leg where they get to fly chutes and I have to gybe.