1.  Cabling.

QPD, picomotor and beam diverter were connected to the cables coming from the ISI. We spent an hour or so just to connect the green QPD cable (D1000568 s/nS1104468), as the male pins of DB25 don't align well with the female pins and the male pins are sort of deformed. This is a known issue with this specific connector, and hopefully this is the last time we have to do this.

2. Hartman reference path.

Two Siskiyou mounts and optics for Hartman reference path were removed from the assembly, as these are not in the production units. However, periscope for Hartman reference path stays as removing it might change the weight too much.

3. Black glass thing.

Attempted to install 5 black glass beam dumps (https://services.ligo-wa.caltech.edu/integrationissues/show_bug.cgi?id=5), but couldn't. The issue is that the head of the tensioner screw on the Siskiyou mount that is holding the picomotors is slightly sticking out from the mirror mount surface, and this interferes with the beam dump holder (https://dcc.ligo.org/LIGO-D1002701).

For newer production unit we remove one washer under the screw head before assembling and the screw head doesn't stick out any more, but in this case we need to retrofit, and removing the screw to remove the washer means that the picomotors come out and the alignment would be ruined.

After some discussion with John Worden, he showed me how to mill using clean tools, and we milled slots for the beam dump holders such that the slot would accomodate the screw head.

Tomorrow morning I'll give them to C/B people so they could be cleaned in untra sonic bath and then air baked. I hope that this can be done by the end of the day, without these things we cannot do initial alignment as 5 pieces of black glasses are heavy enough to change the table balance completely.

4. IAS target not found.

This is another thing that are necessary for  IAS to do their thing. Doug may have these, Corey couldn't find them in the EX lab.