To have maximum power transmitted by the IMC, I had to move the beam on WFS_A a bit out fo the center (WFS_A_DC_PIT = 0.1, WFS_A_DC_YAW = 0.23).  I was not able to recover the same power with centered WFS and an offset on DOF1/2. But maybe just because I didn't have much time to try. Right now, I'm leaving the IMC angular control runnng without any offset. Intensity noise should be good enough.