This morning I got a window to mount the "spare" PEM STS at End Y on the BRSY platform (full, final set up shown in the first image). It didn't go completely as planned however. When Jeff and I pulled the feet off of the STS, we found that the studs for the feet were too short to mount to Krishna's mounting table as planned, they just cleared the bottom of the STS pod 9second image). Per Robert's suggestion, we put the feet back on and just put the pod on the table, where I used the original mounting holes as references to align the STS on the table (third image, I did my best to get each foot lined up with the middle of each hole with the same offset along +X). The table itself is clamped with C-clamps to the BRS platform, and mounted so that the edges of the table are square with the BRS base. I tried to put the STS thermal shell on, but there wasn't enough room between the STS and the vertical part of the BRS. Otherwise clearance around the platform looks okay (last image).

BRSY is out of commission for a little bit, I just got done settling it by hand after my and the PCAL team's work today and it looks like the BRS will be almost out of range until it thermalizes. I'll monitor, but the Evening operator may have to wait to turn it back on. For now, I think using WINDY_NOBRSY in SEI_CONF will be enough to get the IFO back running. The switch to WINDY, when it happens, shouldn't drop us out of observe, but should probably be logged.