I have found that if I line my fabric up with the right outside edge of the feed dogs, I get a perfect 1/4" seam on my Viking 6440. I gave up on a 1/4" foot, the guide was too flexible. I also use painters tape to extend the length of my guide line. My original 1970's Viking included a 1/4" foot that also works great. I used it to place that tape marking location.