Brian,

Thank you for the lima bean node. It would be good if it could produce a range of shapes.
I had a look at the code to see if there was any obvious elements that would be amenable to becoming input slots on the node for variable input, but nothing stands out.

Your explanation however did inspired me to delve a little deeper into Dale Rolfsen's work and Borromean Rings. See below

Keep up the good work
James
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