Got it.
https://forum.audacityteam.org/t/i-passed-acxs-qc-but-the-end-result-sounds-horrible/42749/15
Odd. She calls it “PVC Pipe.” I wonder why it didn’t show up on a forum search. I got it through a painful, round-the-barn search.
She used duvets, not furniture moving pads. So that’s why that didn’t work.
MarieM