Luke;
Thanks tons for posting. I downloaded your file and when I vectorize, I get double vectorized lines (bitmap is black, vectors are blue in attached image). Tried tinkering with the vectorizing settings, and tried starting with thicker and thinner lines on import images, but always the same double geometry. Any guidance?

I can delete the second set, but that is a real pain. Again, any guidance is appreciated.

Click image for larger version. 

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Build 996.