Guess I was very lucky...on my first quilt a friend showed me the way to make bias French fold binding, perfect mitered corners and the invisible join...and now that I am making the faux piping binding, I'm still getting perfect miters even with both sides sewn by machine. She taught me well - I think the secret is stopping 1/4" from the corner and sewing the diagonal off the edge, folding the binding over right and sewing down the next side. She had instructions from Fons and Porter that she used to teach me from.