I've got 10t of Painite (which I mined this afternoon) being held in reserve for any more UA experiments.
The video of UA, Hf178, SAP8 and Painite from my perspective is here...
https://youtu.be/KUNlNDULuuA
As for the sound that Ratking15 wondered about, it's always been there, but it seemed particularly loud this time around.
I did wonder if there were any other sounds which anyone else could notice.
I thought I heard a new sound after the "morse chittering" finished at 1:57 immediately after the "purr" and was 3 tones. High-high-low.