3D Printing Measurement Alignment

When printing from a model, it is interesting to know how well the real object printed matches the sizes specified in the model. Here, I created many measurements in all 3 x-y-z directions and with common structures: cubes, cylinders and cylindrical holes.
We have:
10, 15, 20, 25 and 30 mm in X and Y directions.
3, 5, and 10 mm in the Z direction
3, 5, and 10 mm in diameters of cylinders
3, 5, and 10 mm in diameters of cylindrical holes.

I guess you can also create one for non metric cases from the openScad model.
Feel free to make alterations.

Enclosed is the OpenScad model and the resulting STL file from it.
I also have a youtube movie to explain and show how well my Anet A8 printer driven by CURA does.