It wasn't until I bought a 1/4 inch foot that I realized I was not sewing a 1/4 inch seam but more like a 3/8 inch seam. I'm excited to try a quilt square with triangles to see if that will help me match up the seams and points better. Before I bought the quilting foot, I tried marking my machine, but I learned that I guide the fabric through the machine by looking at the foot. So, marking the machine really didn't make a difference for me. I have a Brother machine and spent $9 on the quilting foot at WalMart.