Attached is a plot of IM4 Trans qpd and ISS 2nd Loop qpd signals.

First plot - top - shows that IM4 Trans Pitch and ISS 2nd Loop Pitch don't match well

First Plot - bottom - shows that IM4 Trans Pitch is a good match to the ISS 2nd Loop Yaw signal (yaw modified: multiplied by -0.7 and an added offset of 0.005)

Second Plot - top - shows the IM2 Trans Yaw and ISS 2nd Loop Pitch - raw data

Second Loop - bottom - shows the IM2 Trans Yaw and ISS 2nd Loop Pitch (pitch modified: multiplied by -0.3 and an added offset of 0.8)