We measured the pitch refl sensing matrix for PR3, IM4 and CHARD again, and adjusted the input matrix for PR3 a little.  This helped to keep our sideband build ups much mroe stable after we transitioned to it and the interferometer seems stable like this so far.  

The old matrix for PR3 was 0.08 REFL B 9I -0.08 REFL B45 I.  THe new matrix is 0.1 REFL B 9 I -0.0768 REFL B 45I 

It seems like we are on the edge of the recycling gains where the REFL WFS have a decent signal for PR3, so that the matrix we need to use changes with the recycing gain.  We've had a couple more locklosses when switching to the new matrix, but it seems to work if we wait ~15 minutes after powering up to try the switch, but it works if we .  I"ve moved the switch from POPX WFS to a new state called PR3_REFL_WFS, so that operators can easily skip it and beam diverters if they need to.  For now I will leave it in the guardian with the advice to operators to wait a while before trying it.  If you are having locklosses quickly after this state, then skip it and skip the beam divereters as well.