I successfully steered out the two output beams from BHD BS to ITMY table today. This required significant changes on the table, but I was able to bring back the table to balance coarsely and then recover YARM flashing with fine tuning of ITMY.

• The counterweights were kept at the North end of the table which was in way of one of the output beams of BHD.
• So I saved the level meter positions in my head and removed those counterweights.
• I also needed to remove the cable post for ITMY and SRM that was in the center of the table.
• I installed a new cable post which is just for SRM and is behind AS2. ITMY's cable post is next to it on the other edge of the table. This is to ensure that BHD board can come in later without disturbing existing layout.
• I got 3 Y1-45P and 1 Y1-0 mirror. The Y1-0 mirror was not installed on a mount, so I removed an older optic which was unlabeled and put this on it's mount.
• Note that I noticed that some light (significant enough to be visible on my card) is leaking out of the 45P mirrors. We need to make sure we aren't loosing too much power due to this.
• Both beams are steered through the center of the window, they are separating outside and not clipping on any of the existing optics outside. (See attachment 1, the red beam in the center is the ITMY oplev input beam and the two IR beams are the outputs from BHD BS).
• Also note that I didn't find any LO beam while doing this work. I only used AS beam to align the path.
• I centered the ITMY oplev at the end.

Next steps:

• LO path needs to be tuned up and cleared off again. We need to match the beams on BHD BS as well.
• Setup steering mirrors and photodiodes on the outside table on ITMY.