Figure 1. Today during the relock after the maintenance I have added in the ITF_LOCK automation that an SR TX offset is added at the same time as the SR TY offset when acquiring LN3. This has worked successufully, and added the offset that of 0.015 that has been working well for the past few days.

Figure 2. The BNS range this afternoon has not been as good as before the maintenance, it may be due to some drift in alignment that occurred during the maintenance, SR TX changed by ~7urad, and the drift control is slowly recovering that with the SR TX error signal not actually managing to arrive back to zero.