I pulled some data off of the beam profile laptop showing the profiles of our beams in different places.  The plots attached are all shifted so that the max intensity is at 0 um and normalized to 1.  For some of these beam profiles I don't know which direction is vertical and horizontal.

Below, the beam leaving the OPO platform is a nice guassian with widths that are only 0.2% different between vertical and horizontal apertures.

Below is the same plot for the single bounce interferometer beam, I believe this is a reflection off of ITMX (this is data that Terra, T Vo, Sebastian and Dan Brown saved). This is very similar to the plot that Aidan made with Terra's screenshots (41541):

And after the seed beam from the OPO passes through HAM5 it has a variety of shapes, some of which seem clearly clipped, depending on the alignment of ZM2.  We didn't do a full exploration of the possible alignments we could achieve with the picomotor, ZM1, and ZM2 because of time constraints, we think though that we have a squeezer beam that is reasonably well aligned to the interferometer beam.  

This beam quality issue isn't a show stopper for the level of squeezing that we want to see in O3, as we have seen that it is possible to couple about 90% of the squeezer seed beam into the OMC.  This would need to be solved in order to get more squeezing.  However, whatever is causing the beam quality issue for the squeezer beam is likely also a source of problems for the interferometer beam, and could potentially be cause more immediate noise problems.