Last week I found all of the BSC ISIs with their St2 GS-13s in low gain. Looking in conlog, I found that the gains had been switched at 07:05 PST on the 22nd, then I found the error and corrected it at 08:59 PST on the 23rd, meaning there was an entire night where the all of the ISI's were running in a different from nominal state. This would be a good window to look at the performance

Additionally, last week, Arnaud tried running the TM ISI's with all of their RZ loops turned on. The largest window I found for this was from about  10:20 to 20:00 PST.

All BSC ISI's have otherwise been in their nominal configurations since then (ie RZ loops off, rdr blends, sensor correction on, all instruments in high gain (except the BS)).