C. Gray, J. Kissel, R. McCarthy, H. Radkins, P. Thomas

We now believe we've confirmed the functionality of all fundamental violin mode damping for all 32 modes of the 4 test masses. As such, I've reconciled the VIOLIN_MODE_DAMPING guardian state, and updated the Violin Mode Table such that all agree with each other and what has been confirmed successful. I couldn't keep track of every mode that had changed, but I'd say it was about 5 modes out of 32 that have changed its settings (and not restricted to any particular test mass, the ITMX has been relatively trouble free). Our latest theory is that the fiber mode shapes and/or their coupling have changed as a result of the earthquake, and thus they require new actuation magnitude / phase.
 
While we only have statistics of 2 lock acquisition sequences, we've been able to successfully turn on automated turn-on of these damping loops as per normal.

We're still having trouble completely squashing all fundamentals (namely EX MODE4 at 505.805, and EY modes 3-6 around 508.2 are still interesting), but they're at least stable.

In our spare time, we're slowly crushing the 2nd harmonics (stuff that's not coded into guardian because it's not typically problematic, but still rung up from the EQ), and updating the reference table accordingly. This is limited by the number of filter banks and our patience, but we're otherwise successful. After O2, we should definitely increase the number of filter banks on each suspension.

Notes:
- this further work on violin modes has not improved the sensitivity. 
- this work has not been impacted by the IFO or IMC beam spot restoration / moves / tests that occurred concurrently.
- just about all lock losses today are from the Beam Splitter ISI's CPS glitching.