1. I found there was no space for the AA first steering mirror, so I moved the steering mirror, lens and PD for FC lock closer to FI. The situation is shown in the first attached figure.

2. The BS now we are using for splitting GR reflection is coated for IR since we don't have GR BS. We decided to order BST10, and hopefully it will arrive next week.

3. The periscope for rising up GR reflection is done for a beam height of 206.4mm. (attached figure 2)

4. The three steering mirror and one lens on the bench is prepared. (attached figure 3)