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.
An easy way to determine the thickness of the drywall you have is to seek out an air vent in your wall. Remove the air vent faceplate, which is usually held by a screw. Observe the drywall edge of the vent hole. If cut fairly clean, you should be able to measure the thickness with a ruler.n easy way to determine the thickness of the drywall you have is to seek out an air vent in your wall. Remove the air vent faceplate, which is usually held by a screw. Observe the drywall edge of the vent hole. If cut fairly clean, you should be able to measure the thickness with a ruler.