I've set damping gains to zero for all PI modes except 3, 26, 27, 28 after there was no sign of them ringing up over long 30 W locks this weekend. Changes have been put into PI guardian and SDF. Thanks so much to the operators who did the work! 

Note that the PI StripTools will continue to monitor as usual, so if any known mode begins to ring up, you can simply put in a gain (try +/- 3000), then try to damp as usual. Just make a note of it in the log.