After performing another -200 steps with B1p_M2_V we were able to maintain the galvo loops of B1p_QD1 engaged while the B5 drift control of SDB1 was engaged. It was than possible to reach CARM_NULL_1F (see attached figure).

The value of the vertical correction of B1p_QD1 galvo is still a bit large when we lock the CITF (around -7V). We will monitor this to understand if a further tuning is needed.