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.