Just one other pointer, if it can be called that, or maybe it is not even right but, this worked for me. When I installed the counter top to the sink and I had to cut out for the faucet I taped it then, I cut. So, I applied this to cutting the drywall, too. I noticed it kept it from getting chewed up alittle. I switched blades after a few cuts, too. I always made sure that blade was sharp. My girlfriend didn't much appreciate that since she was holding the drywall, lol, but like I told her, "better a straight sharp, clean cut than a ragged one, easier to stitch." um, you don't want to know how I know this, lol.