All stabilization loops (PMC, FSS, ISS) were locked this week for the first time all together for more than an hour with 154W downstream of the PMC. The frequency stabilization is not optimized yet, because the temperature control of the tank is not installed and the beam downstream of the AOM needs to be realigned. I will post some diagnostic breadboard measurements later this week. 
During installation I misaligned the camera in reflection of the PMC. So no worry, when one beam image is missing on the TV screen.