Duke William of Normandy won the battle because was well prepared and had a good army. They prepared carefully for the battle. The Normans had knights on horseback who were skilful fighters.
A utility knife, metal ruler, and a hammer can be faster than trying to carefully saw an opening. Score the drywall a couple times till you are most of the way through, then just knock a hole with the hammer and break the drywall back at the score lines.
A. Cut a small circular opening through the outlet box with a drywall saw (Image 1). B. Cut around the inside of the outlet box to create the opening (Image 2). C. Trim the drywall away from the outside of the box to make room for the box to sit inside the wall (Image 3). D. Smooth the hole and finish.