Betsy, Travis, Jason

The reaction chain TFs for ITMx failed last night.  Upon running them with DTT this morning, we saw some very subtle cross coupling in the L and Yaw TFs.  We went into the chamber and tightened up the mounting of the reaction chain BOSEMs which seemed a little rattly.  We also attempted to relieve some of the stiffness of the reaction chain cabling which runs between the UIM and PenRe mass of the suspension.  The softening of the cables seemed to improve one of the subtleties, but not the other.  This is still being worked on via cable checks at the OSEMs.  TBC...

Meanwhile, we installed ACB target and Jason looked at the ACB alignment.  Unfortunately he found that it is ~8mm off in the lateral (!) direction.  This is completely baffling (!) to us since this baffle has been mounted since the arm was used in HIFOx.  Indeed, when you eye-ball the baffle to the optics it does look offset.  So, I guess it is assumed we will fix this on Monday via shoving the whole baffle over (somehow while it is mounted behind the support tube).