I do not have any information about the sleevs.
But do like me. Bookmark every post specific that got good and important information on it. What I do is that I get the specific URL for that post, hit new tab, clip in the URL in the adress field hit ENTER, and then I save a bookmark with that important post. Usally I call it something specific, to find it faster in the future.
I have 388 bookmarks saved from MOS, and all the bookmarks have importent and useful information. Sometimes I open all 388 bookmarks at the same time, to find something I previously had looked at.
This must have been something Lightning did and if we look hard enough we will find it. I would search Google to find it. If it is text Google will have it