Since Betsy found out that SR2 is rubbing at its nominal alignment, (alog 16811), I've tried to investigate if we can move SR2 so that it is not rubbing without introducing clipping.  This was done by moving SR2 pitch, then adjusting SR3 to center on AS_C.  The attached plot shows the power on each of the PDs we have at the AS port, each PD is normalized to the mean powers at different alingments so they can be displayed on the same plot.  While we get some clipping on AS_C and AS_A when we are in the non rubbing zone, happily the best location for the OMC QPDs are in the middle of the SR2 alingments where betsy says there should not be clipping. 

Keita had previoulsy set the alingment of the SRC cavity and the pios to AS_C (alog 15145 ).