(Joe, Gerardo and Peter)

After Peter blocked the beam inside the PSL enclosure, we removed the viewport on BF1 location, cleaned and inspected.
We found some small scratches on the outer surface and some particulate on the inside surface, the particulate was removed without a problem, and no scratches on the inside.
The scratches were measured and probed, the results were good, they are not deep to concern us.
The assembly was re-installed and clocked such as the scratches are not on the path of the beam.