Sometimes older is indeed better especially when it comes to using hand tools which is why I started the thread. Nearly everyone who uses hand tools has had a dad, granddad or even a great grandfather who showed them the nooks and crannies of a particular tool and what they were for. I got an idea yesterday to go back to using a miter box on small jobs instead of carting one of my big miter saws around. I mean, to do a lousy 5 or 6 cuts shouldn’t be a big project of stringing a cord and setting up a saw. It took me about 15 minutes to make the box but when I grabbed my 12” Japanese flush cut handsaw to check things out I remembered an old trick my grandfather taught me when I was maybe 6 or 7 years old. The old Good carpenters used to keep their handsaws not only extremely sharp but kept a mirror like finish on the saw. Yeah, keeping it clean does provide for a better cut but it’s the mirror finish that is the most important. When using a handsaw and need an exact 90 degree cut, you don’t have to follow a line but instead, you can simply look through the blade of the saw. No, I didn’t mean look at the blade but through it. When you look at the reflection of the material it’s as if you are looking through the blade and seeing the other side of the material. If the blade is canted or tilted you can see by the reflection of the material in the blade. If the blade is correctly placed, then the edge of the material will appear as a straight continuing piece of material in the reflection. When you cut, the cut will not only be straight but also a perfect 90 degrees depth wise. Even if you’re cutting a 45, the depth cut still has to be 90 degrees and will show in the reflection if it is or isn’t. Try it with a small mirror on a counter top or some straight edge. Pretend the mirror is the saw blade and move it side to side or up and down and you’ll see the different angles that appear. When the line is straight then it’s going to be a perfect 90 degree cut.