BS/FM 1 fully assembled. BOSEMs installed on Top Mass and PenRe. Full/No Light counts completed for Top Mass BOSEMs, and flags have been centered at 50%. PenRe BOSEM Light Counts will be completed today and then the flags will be centered. BS/FM 1 will be ready for testing and TF by the end of the day. Working with Rai Weiss to determine secondary prism location on FM Dummy Test Mass.