When attempting to Isolate the ISI, the CPS would trip (now that I think about it, this is weird, I would think it would have been the Actuators,) as the horizontal loops were turning on. During this time, the ISI has just restored the locations for the Vertical DOFs. Jim reminds me that the stuff added to the HAM6 Optical Table tilted the vertical CPSs nearly out of spec.
We reset the CPS Targets to the Free Hanging Positions so the ISI wasn't driving anywhere. It worked first time there.
Our theory is that when the vertical loops are closed and the old Targets are loaded for servoing, the horizontal GS13s are tilted sending a large signal into the CPS via the Damping loops and possibly the just starting horizontal isolation loops.
Resetting the CPS Targets Locations shifted the Pitch of the ISI ~70000nrads. Dan & Koji say this is nothing to worry about. I'll leave the SDF diffs alone for now as an easy reference to change the alignment. If you want to return to the previous alignment, just type the Burt Target value into the Requested Setpoint Field (e.g. H1:ISI-HAM6_CPS_X_SETPOINT_NOW) on the CART_BIAS medm. Increasing the Ramp Time to something more than the current 5 seconds might be prudent.
I've attached an image that may help.