It is hard to see in these screenshots, but I have added a small sphere in the middle of each of these models (they are blue and purple) because at the centre of the series of circles that I created in Grasshopper the pipes did not connect properly and made the model look very untidy. And I added some spheres at some of the intersections as well to stop there from being holes in the corners.I don't know why the models came out in 2 different colours, but it didn't matter when exporting it as a .stl file for 3D printing anyway.
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