To help me achieve straight lines, either in a square grid or diagonally in a diamond pattern, I have had great luck using painters tape. It doesn't leave a residue and is reusable from line to line. I just stitch close to the tape (or use your presser foot edge) on each side and replace for the next two stitching lines. Hope this helps achieve that perfect look with just a simple pattern. You can use the serpentine stitch rather than the straight stitch and make it decorative too. Here's one I did recently.[ATTACH=CONFIG]355870[/ATTACH][ATTACH=CONFIG]355871[/ATTACH] I pieced the back too, to add extra width and length. It didn't come out perfectly, but I was pleased.