Stefan and Sheila turned on the ITMX ring heater yesterday from a number I calculated to balance the effective static lensing between ITMX and ITMY.

I trended the BNS range and PRC Gain right after turning on the ring heater (attached) and also looked at the DARM spectrum (attached) for a few times after turning on the ring heater.

It looks like the range goes up by the PRC gain does not, and the spectrum shows that the shot noise limited part of DARM doesn't get much better which is what you expect if the circulating power was actually improved.  However, I'm not sure exactly if this is a calibration issue or if we're seeing the effect of the ring heater in a way we don't expect.