Thanks for making that! I hadn't considered the rotation, because as you point out, it doesn't exactly match up. It's gaining distance from the center of image

Thanks for making that! I hadn't considered the rotation, because as you point out, it doesn't exactly match up. It's gaining distance from the center of image as it moves. It could still be some kind of internal reflection artifact (even dust?) which varies in distance slightly, I guess. I'm pretty sure the team looking at these images would have gone over every object in depth, so it's unlikely I've spotted something they haven't :)