Friend of mine wanted it done. My dad went at it, and the first door the glass shattered within 3-4 seconds of touching it with a grinder. They figure out why and then did the other door with no issues. The car had been 10.64 @ 127, and with the door weight removed and some good air at Englishtown it went 10.41 @ 129... NO idea if the door weight helped, but it didn't hurt!