I accepted SDF values for MC1 yaw and MC3 yaw today that appeared to be swaped, so have looked into alignment of MC1 and MC3 in yaw for 120 days.

It does appear the alignment slider values were swapped, however looking at the IMC WFS and when they were relieved, it also appears that the WFS relief moved the MC1 yaw alignment slider toward the old MC3 value and the MC3 yaw alignment slider toward the old MC1 value (WFS offsets go to zero).

Today IMC WFS have offsets on MC1 and MC3 yaw of around 27.  It might be interesting to run a WFS relief and see where the sliders end up.

Attached are 120 days: MC1 yaw OSEMs, MC1 IMC WFS output, MC1 yaw slider, IMC WFS A yaw, IMC WFS B yaw, MC3 yaw OSEMs, MC3 IMC WFS output, MC3 yaw slider