I choose my I don't care list. A cut off point, I care. A turned seam, I don't care. A wavy border, I care. I think once I learned to sew a 1/4" seam with no guide needed my piecing became as perfect as I can expect. I use the Go for most of my cuttings so accuracy is usually spot on. I starch my fabric for ruler cutting stiff as paper. I prefer Terial spray for the stiffness.