More Tangles

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I have done some more work on tangles, again replicating a tangle shown in Alan Holden's Orderly Tangles. This is a physical, 3d version of the Borromean rings link, and I chose this one as it gives a foot in the door for calculations of the geometry of other tangles. I chose a 9mm diameter for the half-hexagon as this allowed for a 3mm groove with 3mm walls on each side. The groove does 2 things: it reduces the amount of material in the part and the stud at the end clips into it. This was fun to make and I plan to make a bike wheel version of it soon. Some rubber bands and a golf ball can be used to prove the tangle's Borromonean ring construction.