I am calculating the noise coupling due to the damping loop using the theoretical model.
Here, I will submit the preriminary result.

The attached is the DARM and expected ETMX mirror displacement (L) due to the ETMX_MN_MNOLDAMP loop and ETMX_IM_TMOLDAMP loop.
Though something seems to be worng since the estimated displacement is larger than DARM, it might gives you rough idea where the control noise would be.

* Next:

- Find what makes the noise estimation larger than the DARM.