What a crock, the case is glued together!
I'd like to see a full video of the process by the 'Marina Moore (and 7 other contributors)'.
This not an easy job as depicted by the process described above.
As explained to me the glue softening process takes 20-30 minutes and is required twice because the mother board is also glued to the case.
If you are in Orange County, CA, Call Android-Genius in Newport Beach. Not cheap but better it's done by a pro.