Betsy, Travis

This afternoon, we swapped the metal MC1 dummy mass out and replaced it with the IMCF09 mode cleaner flat optic.  Using the auto optical lever to look at the prisms on each side, we set the roll of the mass to within ~0.1mm.  We then noticed a small pitch error by eye which we corrected for using the top mass sliding pitch mass.  This brought the 6 top BOSEMs back into range, as set during the build phase across the street.  We'll continue to tally and align all 6 DOF errors tomorrow.