With fiddle around in scripts I ment open/copy/paste/save.
Flexpainter works in drawing units altough the painter is defined as 9 based.
Even if you switch to a file in a different unit it will adapt your last inputs.
And there sits a first catch. The width is limited to 999.
Never expected one would paint a meter wide with mm as units.
You proposed 1:1 and in the drawing it looks rather 2:3, meaning stepping 2 versus width 3.
I think I even include both.
Not that it matters because you can unlock the build in ratios.
Gave it a little more thoughts and here comes the second catch.
Flexpainter is merely stepping the base-entity and projecting references orthogonal.
In your picture I can clearly see that the equidistant stepping is on the so said parallel 2).
Flexpainter can't do that in one go.
The so said parallel is created at the end from the tips of the spokes by one spline.
And cleary visible is the smudging when the bend is to hard inwards.
The other way around would be.
Drawing a 'Real' parallel 2) and only paint spokes....
Then all depends on how good the parallel is.
The spokes will not adapt to any flaw in distance.
Let me know.