The EY ISI was also tripped. I reset it, so we have damping, but I don't know the secret handshakes for turning on the isolation, so we will live without.
I added an offset to the input of the ST!-ISO_RZ filter bank, turned off the Cont_1 filter, and set the output gain to 200. This results in essentially no alignment bias for ETMY and TMSY. Of course, the isolation won't work like this, but I couldn't find any other way to bias the alignment of the ISI. SEI team: please make this right!
Having figured out how to reset the HEPI watchdog, I moved the RZ bias to HEPI. In the process I discovered that the HEPI DC Biases have no ramps or filters, so they are pretty disruptive. This lead me to use the ISC YAW filter offset (mislabeled V). Here I discovered that the HEPI ISC paths are not in the order speciied on the screen, so I have to send my offset to RX to get RZ. Furthermore, we seem to still have the "poor choice of calibration units" problem, since the offset needed to make 14k counts on the H sensors was greater than 106.
The ISI settings are now as before. Note: we have no isolation on either ISI just damping.