From about 6:25 bto 7:25 utc I injected into the piezo shaker mounted on top of HAM6, eventually settling on a line at 56.1 Hz as my signal. I then walked the beam at the output port by offseting the SRC2 loop. I went +/-0.5 in both pitch and yaw and saw no difference in the scatter coupling (from the shaker line). I was checking with a simple running spectrum and DARM bandpasses, so I will do a finer analysis and attach the results here.

Somewhat superficial observations, but both kinda good news:
- I had to inject a lot (~8 out of 10V possible) to make any noise in DARM in just a line, I tried around 50 and 75 Hz - caveat: this shaker is mounted in the X-direction and we may be more sensitive to Z;
- it seems there's no large scatter fluctuation with the output beam pointing from SR2 to AS_C (which includes going through the OFI).