Yeah, I get it's a challenge for sure!...I know it's a personal preference thing but to ME I would rather have this 5.0 with these issues on the back any day over lets say a 6.0 book with multiple smaller issues on the cover, corners, etc...This long crease shows up much more prominently on the hi res scan, at viewing distance a few feet away there is only one area on the crease to grab your eye, that said, from what im gathering there is no real mechanism for grading a crease thats lighter vs heavy and more distracting? Ultimately I realize it is what it is and all variations can't be accounted for but hearing the thoughts of people who have been at this a long time does help, so I appreciate the input.