Koji, Kiwamu, Stefan

- We had some luck locking the xarm today. The best configuration was ITMX ISI State 1, ETMX ISI State 2. However we still had too much arm length motion - slightly more that the 15um that we can tolerate with the 1MHz VCO.
- We tried feeding back to the SUS ETMX top stage, but the speed was too high (every now and then it reached ~30um/sec, which is too fast for relieving through the 0.44Hz pendulum resonance).
- We haven't tried the HPI feed-back, which is currently not wired.

- We tried switching off both ISIs - the fringe velocity was definitely improved, but the alignment was no longer stable enough.

- We also did some alignment tweaking with the IAL system in dither-only mode, but we need better arm stability from the seismic isolation for further commissioning.