Now that we have the DBB plugged in again, we can relook at the coherences of the QPDs.  The screenshot shows coherences for DARM and SRCL with for the 200W beam (opening the 35W shutter unlocks the IFO).

We have small coherences with DARM just below 1kHz and around 4.2kHz, but not otherwise.  SRCL does have more coherence with one of the QPDs below 100Hz.