Another way to get the seams to match is to nest them together like normal, then pin ACROSS the seam. Let's see if I can explain it, lol Nest the seams, come down JUST PAST the 1/4 mark, enter your pin IMMEDIATELY ON the right of the seam and come up IMMEDIATELY to the left, using only the tip of the pin to hold it in place, open it up and check if it's straight, sew at the 1/4 inch. As you sew over the seam, your pin will be under the left side of the foot. As you go over the seam one or two stitches, pull your pin out. Try it, it works for me. Syl