Here is a lock loss from around 11 PM tonight. Might be due to poor PRC signals. 

This is with arm powers of ~6-10. You can see that with such a large MICH offset, POP22 signal has gone done to zero. Perhaps this is why the optical gain for PRCL has also dropped by a factor of 30 .

This seems untenable . We must try this whole thing with less MICH offset so that we can have a reasonable PRCL signal.