-chuckle- The scenes with the Marauders were excellent; I do believe they've now learned to think more. The scene at the end was not pleasant but it gives us a much better understanding of the Dark Lady; I wonder if any of the power she's taking in "bleeds over" the connection between her and Harri? I'm going to make the assumption that Harry's scar doesn't hurt because he's "tuned" to the Riddle of his home universe, not the one he's in.
I rather imagine it's a challenge to write this kind of mirror-image universe, but you're doing a right fine job of it and 'tis enjoyable reading.