Apparently, the one I, and most people got, is not the version I would have wanted. I have E-Powers and they've got cone options like Egos. The cone becomes important when attaching a long XL carto for stability purposes. I was looking at my Indulgence V3 and the outer thread is not there.
And I forgot to mention that the other version, which presumably the later one, has three holes on the bottom cap.