I saw some tips on YouTube, ie. to slide some strong piece of mylar through the bottom of the case and to wiggle it about, and I did try it one on a low value book but to no use.
This book on the other hand was just so thick to begin with, go to be 80+ pages.. Almost makes you wonder that perhaps it should've been a square bound issue. And perhaps the larger CGC case could be used with these thickos
And I agree, on the scan it looks great. Looking at it dead centre in certain light its ok. But at most angles its hard to miss.