I'm machine quilting a quilt (Downey, Quilt for kids) for the first time. I was told to set my stitch length at 3.0. Now that I look at it, it seems like the stitches are too close together. I only have the borders left to quilt; do I use the same stitch length I started with or use a longer one? What stitch length do you use for sewing machine quilting?