M. Phelps, G. Traylor, B. Weaver, myself

Today we successfully installed the ITMy lower structure into BSC1.  Recabling of the reaction chain has begun.  As a health check, we hung the test mass as a single pendulum to verify the integrity of the monolithic.  All is well.  We relocked the suspension since it is second in line for alignment work a couple of weeks out.  Tomorrow, Apollo will remove the BSC install arm.

The old lower stucture was put back in the can and flown to the test stand cleanroom vicinity for upcoming 3IFO rework.