This afternoon, Travis and I finished the necessary part removal to drop the Lower structure and it's 6 masses from the ITMx suspension in BSC3.  Mark D helped us run the arm and the elevator controls to bring the unit out.  We had one small hiccup where we accidentally yanked a wire off the reaction chain top mass which was snagged on UIM hardware.  We'll have reinspect the this top mass and then hit the lab to rebuild the wire segment.  Win one for poor lighting, not have an infinite supply of eyeballs and snaggletooth UIM structure hardware sticking up during this procedure.  Thanks in advance for Jeff K's pictures likely coming to the alog.

In other news:

Jeff B and I were able to successfully* swap the SRM surrogate mass for the full SRM optic SRM-06.  I first contacted the HR surface prior to installing it.   We measured weights prior to install:

SRM-06   2885g  (2886g with the FC sheet)

Surrogate   2905g

Jeff added 20g to the middle mass in order to compensate for the loss of weight to the SRM optic stage.  Jeff and Hugh are currently working on setting pitch and roll.

*Successfully:  the optic was not damaged, the wires of the suspension were not broken, the optical lever we were attempting to use was only mostly compromised.  While trying to sight the far side wires around the prisms during the install, I rolled a shoulder into the temp oplev beam staged on the table - even though it was placed as far out of the way as possible.  Darn cramped spaces!  Oh well, the pitch info from it is still useful and we have other ways to course align P/Y.  Final alignment will happen early NOV with PSL beam.

IO has continued efforts in HAM2/3, still at it now...

Hugh finish install of needed feedthrus on HAM5.