This is the most delicate part and also the Heart of this little Hack. The metal parts that stick out along the edges and back need to be sawed off and filed down.
Unfortunately I lost the picture of the screen pre-modification, so here are the results. You need to get the metal down as close as you can, being extremely careful not to damage the screen in the process.
I actually did chip the edge, right next to an embedded wire. Fortunately it hasn't seemed to cause any problems.