This morning I noticed that the PMC was reflecting close to 20 W, which is unusually high; the PMC was transmitting 56.4 W. Some of this increase is due to the continued decay of HPO Diode Box 1 (decay changes the thermal lens in Head 1, which changes the mode of the output beam of the HPO, which then changes the mode matching into the PMC). Until the spare DB arrives from LLO this is what we have to work with, so I tweaked the beam alignment into the PMC to gain as much transmitted power as possible. The PMC is now transmitting 59.1 W and reflecting 15.3 W. This closes LHO WP 6661.