Over the summer we made some efforts to implement the MICH CPS feedforward (MICH freeze) that is used at LLO here.  (19461 19399)  The idea is to slow down the michelson fringes by predicting the motion using CPSs and sending this to the suspension.  In the summer when the ground motion was low, there was no benefit for us in slowing down the Michelson fringe, so we haven't been using it.  

This morning Evan turned it on again, and it did reduce the RMS MICH control signal a little bit.  (plot attached, with ground STS for reference.)

This seems to possibly be helping us acquire PRMI lock, and make DRMI look more promising.  

If operators want to try it, which is recomended while the microseism is high, the screen is linked from the LSC overview screen (2nd screen shot).  The third filter module, labeled L1LSC-CPSFF is the relevant one.  If all the settings are the same as shown in the 3rd screen shot, just type 1 into the gain to turn on MICH freeze.  When either PRMI or DRMI locks, this will be set to zero by guardian, and if it breaks look and you want to use it again, you will have to type a 1 in again.