ITMY mode 8 used to be damped using - gain and no phase shift, now it is damped with positive gain and no phase shift. 

ITMX mode 9 used to be damped using no phase and + gain, now it is no phase and -gain.  These changes are in gaurdian.  

All of the changes that we have had to violin mode phases are on the ITMs, which makes me wonder if it is possible that changing the ring heater settings could change something about the violins.