Trying to tune Vcore 400mm

I attached the ADXL345 accelerometer to Vcore 400mm and ran the macros in RatOS for belt tension and input shaping.

I gather working on belt tension should be done first, but my graph looks nothing like others, so what does it mean? Too tight, not tight enough?
belt-tension-resonances-2023-12-28-022554.png
resonances_x_2023-12-28-023355.png
resonances_y_2023-12-28-023405.webp
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