[DanDan]

Thanks for doing those pics Chris. There is a lot more detail in those, presumably due to increased power in FM3. However, IMHO neither looks better to me, and I cannot clearly identify a 34Hz component, with a change or not in it. I wish I could but I am not seeing it.
Chris would you oblige some more please- Lengthen the axis to 2000 or even more mS. See if any anomalies show up. Try as far 3000mS. I have found that the anomalies travel out the time line with these extensions. Ghosts! Then lets go back to to 1500mS, which should show all of that mode.
I think the -65 might be too much. My room is not that quiet! My settings tend to be -40 or -45.
Please also try for third octave information decay times?
spm- I will think about that. I can get the tubs free but a carpenter associate made that lovely lid, and I paid him. I don't think the results so far merit further work but I will consider it. I do note your earlier comments regarding your own array.
DD