Heat Bed Warping Calibration Print

If you measured every corner and center and discovered warps? With this print you can test which part you have warp and use thin objects to make it perfect.

I saw several test for this case but I made my own quickly on Fusion 360. After several runs I could print a 15x15cm print without problem after this print and using 2x2cm (or post-it) to fix the warp.