1. Before any cuts were made, they also mapped out how to reposition the back glass and still retain its stock size. Since they could shift the back window opening down toward the belt line 2-3/4 inches and still have it look visually appealing, John and the crew settled on that 2-3/4-inch measurement. John uses a combination of 2- and 3/4-inch tapes to speed up the lay-out process. You may be asking, "What about the windshield?" That will end up being tilted back later in the story to retain its stock size.