This is a easy way to calibrate your steps. Use a calipper to measure X/Y when it is stuck to the bed.

Rotate the X/Y model 90° degrees if you need to. longer measurements is easier to calibrate.

If you do this right you only need to do this once and get a 99.5% accurate printer :)

Please let me know if any information should be added to make this test easier to understand and use. Also if other models could be helpful please let me know. I do not wish for anyone to remix or copy this thing, but would rather that people help make this single thing the best steps calibrator there is.