Hmm, I'm not so sure this is my problem now, I have Rev.D atm:
RPM Req. Act.
2840 2300 2400
3200 2300 2350
3520 2260 2270
3800 2210 2180
4120 2180 2120
4400 2160 2110
4720 2160 2160
5000 2120 2090
5280 2010 2030
5520 1860 1950
5800 1770 1830
5960 1690 1740
6160 1670 1680
It's not a million miles off.