I prepared a new filter module with resonant gains at 2.8 Hz and 3.4 Hz. This can be tried tomorrow (on during some commissioning time) to reduce the DARM RMS and see if it helps the non-stationary noise.

The new FM is loaded into DARM2 FM1 "RG2.8-3.4". It is not engaged now.

For future reference, here are the FMs that are used during lock acquisition:

DARM1: FM1 FM2 FM3 FM4 FM7 FM9 FM10

DARM2: FM3 FM4 FM5 FM6 FM7 FM8 FM9 FM10

leaving DARM1 FM5,6,8 and DARM2 FM1,2 unused