Aligning stroke to outside (not a solid path)

Hi All,

See attached picture for what I am trying to achieve please.

I am trying to create a circle where I can align a stroke to the outside of a path - however I need to be able to break the circle up into sections - once I do that - I cant align to outside anymore.

Aside from breaking the green section apart and aligning it manually by eye, is there no other way to do this? Perhaps by aligning all segments of the circle to another circle (one that hasnt been broken apart?)

Thanks in advance.