We have gotten back the ISI performance, at least to a tolerable state for the moment.  Hugo doggedly compared all the filters between the ITMx & the ETMx to get the ETM in the same state.  It ends up being exactly as we had it last Wednesday when Fabrice worked with us.  Stefan has also 'greened'  up the 'State' so that may be helpful.

The state is:  Both ISIs use lvl1 control.  Both ISI Stage1s use 100mHz blends on X Y & RZ (horizontal dofs) and 750mHz on Z RX & RY (verticals.)  Additionally the ITMx has .45Hz notches engaged on X & Y.  For Stage2, the blend is 750mHz for both ISIs.  Both ISIs have been brought to this state with one click "! isolate iTMX lvl1" from the command medm.  It is possible that depending on how long the HEPI at the ETMX has been tilted, the T240 may be too rung up and they may trip the ISI as it attempts to isolate.  We aren't using the T240s in these blends and I'm pretty sure they won't be bothered so the WD trip level can be taken higher temporarily to stop the isolation interruption.

Attached is a plot of the ETM & ITM spectra.  The green ETM spectrum shows the more aggressive things we were attempting and the red trace for the ETM and the dashed trace for the ITM shows the state we are now in and last Wednesday.  We don't isolate as well below .1Hz but between .1 and .4 it is better and that seems most important.