Saw the FSS RefCav TPD was down to ~0.44V with the IMC locked, so had asked Tony to let me know if we lost lock so I could tweak the alignment; after the most recent lockloss I took the opportunity (with LLO down for testing) to do this.  We had been seeing this drop over the last several days (coinciding with the rapid drop in outside temperature).  Jenne performed a remote beam alignment tweak on Friday.

When I started the RefCav TPD was ~0.45V with the IMC unlocked.  I was able to get it up to ~0.53V, but could get no more out of it.  Tony has begun relocking, hopefully this gets us to tomorrow's start of the O4 break.  We'll have to take some time during the commissioning break to get in the PSL enclosure and adjust the FSS beam alignment on the table.

While doing this, I noticed the ISS diffraction % was lower than we tend to like it.  It was hovering just below 2%, so I adjusted the ISS RefSignal from -1.94 V to -1.95 V; this brought the diffraction % to ~2.5%, where we like to run it.