Adding multiple edge rings to selection (like slice)

So i have a little trouble here with selections and editing them. I have a cylindric shape with around 256 verts. I need to add 2 edge rings in the selection, propagated over the whole circle, of course. I did it for the outer ring with some cheating of “inset faces” that have been set to boundary and outset. Now i need them for the inside part, but with boundary, it would connect the outer verts.

Here is a little image for a better understanding.

So, someone see a quick way for it, or is there just a different approach with array + empty?

Can you explain a bit more what you are trying to do … it’s not so clear to me right now

I updated the example image. What i was about was to split the edge between the green and red ones. The green ones where created with boundary + outwards insets to the selection. I could do the same by inverting the selection, but it will not include the extruded face. Also there is no array nor bend, so it has to work all around the circle without manual selections.

Sorry, didn’t see your reply till now - will give it more thought tomorrow

Can you upload your .blend?