ETMY violin mode2 has been growing, and the RMS is currently at 3.64, so heading to 4.0, and the peak in Cal_Delta is at 1.7e-16 and growing, however, I can't type in a gain to damp the mode.  My first try the gain was loaded for a few seconds and then turned back to zero.  Very soon this will be big enough to cause problems.   I don't see any other Operators that have taken H1 out of Observe to damp.