Roundness test

Before printing of axis rotational things, there is a point in making a center of roation axis uniformly oriented. This test answers the question: which is center of rotation xy scale factor on 200 mm diameter.
How to use:
Print this test, measure x and y(place test xyz proper in your slicer, there is letter on the top and axis orientations),
divide x\y, if = 1, it is ok.
If not,
for example x diameter=200.5 y diameter = 201, 200.5\201 = 0.9975, then set the scale value x scale=1,y scale =0.9975,
or vise versa:
y \ x, then set in your slicer x scale = 1.0024, y scale =1,
depending on the closest value to 200 mm.
Thank you for your attention!