Yesterday Rahul and I went to HAM7 to try to address the suspension problems reported in 88913.  

I watched the beam on SQZT7 irises in the homodyne path while Rahul moved cables away from the suspended platform, the beam moved as he shifted the cables near the V3/H3 osems (the hard to reach ones) away from the platform, but not so much that we lost the beam.  He also tried lifting the cable connector for the new translation stage on and off the OPO, this had a similar impact on the alignment but we never lost the beam.  

We left the connector as it was, but moved the cables away from the platform.  The beam coming out of the chamber was hitting the top of the upper periscope mirror on SQZT7, clipping somewhat there.  We took the power meter in chamber and measured 20-30% losses between the beam leaving the platform towards the filter cavity and the beam returning in transmission of SFI1, which was pretty consistent with the power measured on SQZT7.  

Jeff re-evaluated the suspension health 88921 yesterday afternoon.  This morning from the control room I moved ZM1 in pitch -1800 urad which seems to have relieved the clipping according to the OPO IR TRANS PD, but has saturated ZM1 pitch.  This can probably be offloaded to A:M3 to relieve the saturation.