Knot from pipes

Rhino Rhino for Windows
1

Friendship knot.3dm (1.1 MB)
I have been trying to replicate a knot you can see on the image, I tried with curve/pipes commands, and I still can’t get it right!!! GRRRRRR!
Anyone being able to help will be tremendous.

2

Your pipe must be twisted, look in my file.

friendship
friendship1376×726 106 KB

Frienship knot-6.3dm (1.5 MB)

3

Thank you very much. Excellent help