Those who don't pin and still get matching seams have discovered a magic technique. The rest of us have to pin, pin, pin,pin to get the seam to match. It is all part of the technique of the craft. And don't be mislead by those experts on YouTube.......They have done it a long time. They know their equipment and they probably use little tricks we don't see on the tube. And afterall it might be easy to get one block right.....but what about the rest of the quilt. It is just like the demos at quilt conventions showing freemotion and machine quilting. Always on a 12" square. Never on a full size quilt.