I've done this in Truespace Blender LW C4D

1The mesh don't touch .

2Boolean.

3Wield points togeather.

Boolean seems to work better that way.

You can subdivie the mesh look at the toplolagy .your see any xtra vertices that way

Blender LW u half to make sure there is only one line some time there's 2 at the same place. pull the polygone a way to check.

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