After over an hour of trying to use heat and the suction tool loosen the adhesive and try to get an opening on one of the edges, I used the blue spudger to see if it would slip thru the edge and it did. I was able to loosen the majority of the back glass but ended up getting excited and rushing and cracked the top corner. I was able to complete the battery replacement and use the cracked back glass. I’m going to order a replacement for that and that should be easier. Lesson to be learned, if any part of the back glass is getting a little tougher to loosen, hit it with heat again just to be safe. The rest of the replacement we pretty straight forward.