[Rana, Ayaka, Jenne]
We aligned the REFL beam to the center of PD.
Also we removed the small black parts from mirror holder so that the beam is not clipped. They are originally for holding the mirror, but the mirror should be held by the small screw on the side of the mirror mount. This screw was hidden by the label, so we moved the label on the right hand side of the mirror mount (See a picture below).
Also we removed the half-wave plates and PBS so that laser power is increased.
Then I aligned the beam for PMC, locked MC, and centered the beam spots.
The MC2 pitch is a little bit high but still close enough to the center.
Jenne had also centered the beam spots on QPDs for WFS.