A quick request for operators:

Let's try a test of running the a2l test every lock.  If you see that the low frequency noise is degrading over the course of a long lock, you can rerun it to see if that helps. 

As a reminder:

get to nominal low noise

go to userapps/isc/common/scripts/decoup/

type:    ./a2l_min_LHO.py

8 lines around 20 Hz will appear in the spectrum and slowly get turned off one by one as the script becomes satisfied that it is done with each optic.