I may want to use the delay line phase shifter in 1Y2 to allow remote actuation of the REFL11 demod phase (for the AO path, not the low bandwidth one). I had this working last Feb, but today, I am unable to remotely change the delay. @Koji, it would be great if you could fix this the next time you are in the lab - I bet it's a busted latch IC or some such thing. I did the non-invasive tests - cable is connected, control bits are changing (at least according to the CDS BIO indicators) and the switch controlling remote/local switching is set correctly. The local switching works just fine.
In the meantime, I will keep trying - I am unconvinced we really need the delay line.