I tuned the Y2L gains in the same way as in 77539. 

I've added two templates to userapps/asc/h1/templates/manually_tune_P2L.xml and manually_tune_A2L.xml 

These templates have excitations for LOCK P (or Y) for each suspension at 30 Hz.  In all the quads, we have bandstops for 30 Hz in ISCINF_P and Y (FM7).  To do this I turned all 8 of those filters on, then one at a time inject 30 Hz into Lock for each DOF, checking for the height of the peak in DARM, coherence with the injection, and the transfer function of the excitation to DARM.  I changed the gain to improve the transfer function until the phase flips. 

If this has to be done frequently we should make a script that will do this, as it seems that the script that calculates based on the ratio of transfer functions doesn't work well.

The attachment shows that the improvement in DARM from today's commissoning time mostly comes from SRCL feedforward (and maybe the ESD bias tuning), but that the CHARD Y coherence hasn't changed much.