single curve in hexagonal surface [?]

hey i wanna share this cool definition that i've taken from :

http://www.grasshopper3d.com/profiles/blogs/complete-hexagon-on-sur...

by Arie-Willem de Jongh

very nice, i have tried it and wanna fabricate it. But i have some problem, that curve in each hexagon pile up between each others, so the joints can't attached well.

how to make every hexagon in the definition become a single curve?

Thanks before