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.
Absolutely, mud will stick to plaster. Cutting the plaster out straight and patching back in with drywall if the toughest part. Chopping will work, but tends to break out past where you want it to. Sawzall will work, go slowly. Drywall cutout tool with a tile bit will work.an you adhere drywall to plaster? I'm renovating a 1905 farmhouse and have to pull the exterior wall out of the main floor bathroom in order to fur out the 2x4 walls and properly insulate.