A couple of years ago I bought a 12-inch skill saw chop saw. I didn't use it for the first couple months after I got it because it was winter time whenever I bought it. Once I did start finally using it I came to realize that it was not cutting 45 degree, very well. I made a project or two with it and couldn't figure out what I was doing wrong and why all my 45° Cuts were not coming out 45° after doing a little bit of research and realizing that it wasn't my fault. I found that the saw itself on the backstop was not plumbed Square to the blade. So when you buy a new saw, make sure you check and see that your blade is square with your backstop.