Sheila, Kiwamu, Alexa, Evan, Nergis

After locking the x-arm in green (alog) and testing for the x-arm losses (alog), we repeated our usual initial alignment procedure. Some comments:

• With the x-arm locked on green, we adjusted PR3 to increase the COMM beatnote from -1dBm to 4.5dBm.
• We had to move SR2 by a lot to get the AS_C QPDs centered, as well as the ASAIR camera.
• We restored HEPI RX, RY offsets for HAM4, HAM5
• The RM's master switches, dampimg filters, and M1_LOCK filters were off, which are all needed for the DC centering servos.
• Kiwamu turned off the POPB offsets that he and Stefan had added about a month ago when they found the position that gave the best DRMI buld up.  Currently the beam is well centered on POP_B, but without the offsets on.

We were able to lock ALS COMM very easily; however, we had difficulties locking DIFF. At first we thought we had found our culprit: LSC-DARM had FM10 engaged, which should not have been; the LSC-DARM filters should be FM5, FM7, FM8 with FM3 turned on later. Even after we noticed this, we still could not lock DIFF. As soon as the DIFF engages (even with gain's of 1, relative to the nominal 400), we would immediatly lose lock. We ensured that the ETMX ESD was working by sending in an excitation to the bottom stage in both pitch and yaw; this was successful and we did not see any large Y2P or P2Y coupling. We did not take L1, L3 crossovers, which we should do tomorrow. We also had trouble getting the DIFF PLL in range -- the old guardian tidal scripts the Nick wrote have been decommissioned, and we were not yet ready to implent Daniel's new tidal feedback, so we were left to using an ezcaservo in the test offset. This did not work very well, and limited us from figuring out what was wrong with DIFF. It's possible that there are still some more inccorect filter/gains setting.