Today I opened the gate valves between END/arm. The pressure in END and arm before I opened the gate valves was 8.7e-7 mbar and 9.4e-8 mbar, respectively. After I opened the gate valves, the pressure in END and arm became 6.6e-7 mbar and 1e-6 mbar, respectively.

After the END mirror alignment with picomotor, we finally recovered the green flash!