When you cutting the edge you can also put some books under the display part to keep it level and easy to go around as you cut. If you cut the bottom all the way with the razor, you will have a clean cut and you can pull it towards you while the unit is as described in the guide steps 18-22. I do not like the idea of standing up the unit as there is more pressure on the bottom edge of the glass from the displaly
Since there is not antenna wire to cut around the frame, I used a razor blade and and stopped at the camera and it worked like a charm. Where the guide used the card on the bottom edge for the final cut, I used a razor blade also and it only took one cut verses going back and forth with a card.
When I used a tool, the adhesive kept sticking together again as the guide mentions. The razor cut the adhesive down the center itself, so it was one easy pass and on sticky adhesive.
If you take a small chip out of the glass on the edge or crack, just get cell phone protector and cut it to size. You can also go to home depot and they have a glass specific crazy glue that you can first put in the crack or chip (do not put on the casing part. I cleaned with crazy glue first). Use a razor to get the glue into the crack, let dry and then clean off and put on the screen protector. I used rubbing alcohol first to clean the glass and chip area.
Not a perfect solution, but better than $700+ for a display.