On Friday, I had set all 4 test mass ring heaters to 1.7 W (which was too high, should have done 1.0 W per segment).  The 1.7 W per segment values were bad for the IFO, and we lost lock.  However, I neglected to set the ring heaters back to their nominal lower values :(  I have just now done so (both ITMs have 0W per seg, ETMX has 0.44 W per segment, and ETMY has the 1.0 W per segment that seemed to be good at keeping us away from the 10.4 kHz PI mode).

Locking will probably be challenging this morning as things re-thermalize.  If we spend a lot of time trying (but not succeeding) to relock, we may end up needing to do another initial alignment in a few hours after some of the thermalization is done.

Sorry!