I, too, think my piecing is off just that 'hair' that it's my cutting as well. I know I am not consistent. The other evening working in very dim light, I tried using some post-it notes on the ruler line and, honestly, it didn't help in that particular situation. I was only trimming batting on a baby quilt so wasn't overly concerned. I keep telling myself when I'm thinking about quilting and not actually quilting, that I must remember to use some painter's tape on my ruler to get my cutting consistency better. But then I forget when I get to the sewing room. Sigh. One of these days.