If you go to http://www.guidelines4quilting.com/PT.html you will find their Prep-Tool. It makes a scant 1/4" seam. They sell Seam Guides (5 to a pack) that don't leave any sticky residue and can be reused to place as a guide for the scant 1/4" seam. The Prep-Tool has a few uses. I love it. I've used it on all three of my sewing machines.