This morning, the IFO was locked and noone was around, so I took a look at how my endstation ISI configurations affected ASC. The two configurations I looked at are:  

O1 high microseism configuration, 45mhz blends, .46hz sensor correction to St1 X&Y

The current configuration, with 90mhz blends, useism sensor correction on St1 X&Y and .46hz sensor correction on St2 X,Y&Z.

The two attached plots show ASC D/C hard and soft pitch and yaw signals. The Common ASC signals are on the first plot, Differential are on the second plot. Dashed lines are the "O1" configuration, solid lines are the "current" configuration. I don't know ASC enough to say if what matters here, but the differences aren't dramatic.The main differences are where I would expect them: the current configuration does worse at the microseism, but better over 20-60mhz. The environment is not particularly difficult today, microseism is about .5 micron (90th percentile?) RMS and winds are low. It would be good to do this measurement again under different conditions (i.e. high winds, higher microseism).