I wonder though if it should keep the inverse and also have a black border with an outer white border. It is much better, but still gets lost sometimes. Thoughts? The outer white border, like on the mouse pointer helps sooo much to pop out small nodes against dark colors.

Double borders? Hmm, that's something even Inkscape cannot handle without some additional coding... Still, consider that we now have an edge over both Xara (which has inversion but no border in its knots) and Illustrator (which has border but no inversion).

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