I think that when we reworked the X arm input path on Friday, was done with the ETM badly misalinged (by 250urad in pitch).   With the ETM realigned we still have a reflected beam on the LSC PDs and on the WFS.

The mode matching seems to have improved, we see flashes of up to 1000 counts, which is the most we expect given the ETM reflectivity. The lock is verry unstable right now, possibly because of the large motion of the optics.  I have raised the locking threshold for the arm autolocker.