That is a good illustration, except (minor quibble) I don't agree that "properly filled" and "underfilled" are quite the right terms, since either is a perfectly acceptable fill. Having said that, I have no objection to adding it to the Vaporpedia entry for the MFLB, but I'm unsure about permissions when an image originates on Imgur.com. I know Imgur has rights once you post an image there, but I don't know how these extend to other uses.
What I'll do is add it and take it down if someone claims copyright infringement. I don't really think that will happen, and I'm comfortable that the original owner won't be offended. It was posted on Imgur, after all.
Finally, as always, I remind everyone that anyone can ask for a Vaporpedia account and do this sort of thing without asking me. In fact, I encourage it. I'm not offended if someone thinks they can add to or improve anything on Vaporpedia, including the MFLB entry.
ETA: Image added.