A set a cubes to measure the X/Y/Z distances of your machine vs the model. After measuring, you then know how to scale other models.

the cubes are 3cm each

The form goes from 3 cubes wide to 3 tall.

Enjoy

Print and measure with your calipers, calculate the averages, do math, know how to scale

note: This is my first time using openscad so, feedback is appreciated