I think I finally understand what you mean about the shape of the "nib". I revised it with a different but common puzzle shape. Hopefully, this is closer to what you want. If not, let me know. Also, the line itself can be oriented in four different directions so I made a version of each. If the new "nib" shape works for you then let me know which of these four versions you like the best and I will start to work on some different color ideas like you asked for. Thanks, Todd.
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