Post Enclosure Kit Resonance

VCore 3.1 500. Just added the Enclosure kit, but not the panels yet.
At the same time, I replaced the printed motor cages, idlers, and joiners with metal plates.

Now my resonance is weird and I've been chasing it all day. The extra weird ones are the Y. I do not know what is going on there.

I believe the second hump in the X is from the ductwork. Can't seem to tighten that away.

Pictures included are most recent comparison, most recent X, and several Y. The most recent Y is extra strange (with the double peaks at 7)

Where do I look to nail this down?

edit: maybe I'm binding? I don't recall how hard it should be to push when de powered
resonances_23.png
x_23.png
y_23.png
y_21.png
y_20.png
y_19.png
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