Naked edges problem

hi there, I have a problem with naked edges. watched some video’s on youtube and read a few forum posts but can’t seem to make it happen. if anyone can check out the file and help me that would be a blessing, thank you.

Untitled.3dm (1.0 MB)

Hi Ryan - I tihnk what you want is for all the parts of the ring itself to become one closed object, correct? I would start by removing (ExtractSrf and delete) the faces that close off the parts where they meet -

Then Join these


then Cap the center bit that bridges across and BooleanUnion the two- note this is a dodgy Union because the surfaces become nearly coincident but here it seems to work if I BooleanUnion with no pre-selection and pick the middle object first.