In light of the recent oplev issues (primarily the increased signal noise, which is an indication of laser glitching), I swapped the oplev laser for a spare so there is not an issue with the oplev during the upcoming ETMx work (as the oplev is being used as our alignment reference).  The old laser is SN 130-1 and the new laser is SN 197-2.  The new laser has not been tweaked for glitch-free operation, it will have to be replaced before the start of O3 with one that has.