Last week while working owls I observed ITMX roll mode coherence with DARM was high compared to the other optics.  I alogged ITMX roll mode before making changes: alog 33791. I alogged the improvement with -30deg phase: alog 33796, and updated SDF but did not update Guardian.  Measured again today and got the same results, so talked to Keita while H1 was out of Observe for a2l, and he ok'd making the change, so engaged FM7 for ITMX roll and saved changes in SDF and modified guardian.  Power spectrum and coherence plot attached, as well as a snapshot of the code change in guardian.  Note to reload ISC_LOCK is posted on the OPS white board.