I aligned the periscope for the forward beam on POP. This and other optics were roughly placed previously (klog 19226) but not aligned due to the absence of good IR beam.
The attached pictures shows the situation of the periscope and mirror after it. Since forward beam is very close to greenX beam the space between the two periscope is very small.
This lead to the need of installin the mirror after the periscope in the "wrong way" inside the optical mount.

I will continue the alignment work tomorrow.