The cavity is locked and operating normally as of 3:00 UTC (20:00 local). The ISCTEY HEPA fan is off.
The addition of a Faraday in the green laser path has reduced the operating power by about 20%, so REFL_PWR_MON_OUT between 5000 and 8000 indicates that the cavity is locked and reasonably aligned.
The cavity alignment degraded as the force applied to M0 on the ETM increased to the maximum value (200k in L, or 100k on each BOSEM). It was locked and well aligned for the first hour, and stayed locked for 10 hours (until 13:00 UTC) before the ETM hit the limits.