Solidworks Spline tool not a smooth line when exported as 2D drawing

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Here is a site that shows how to make what they in marine call "ducks", though I alwys heard them referred to a "mice" to locate a spline for shapes much bigger than any ship's curve or French curve could follow. https://duckworksmagazine.com/06/howto/splineweights/index.htm This site shows them used to make guitar bodies. http://www.frets.com/FretsPages/Luthier/TipsTricks/DraftingWeights/draftweights.html Here is a more total form of history which includes the "ducks." http://www.alatown.com/spline-history-architecture/