I struggle with "scant" also. My best results were when I measured with a ruler and taped a credit card down as a guide. Well that works until you have to do half-square triangles, then the guide gets in the way. Eventually, I just used my 1/4" foot as is. I'm sure it's not "scant", but as long as every seam is sewn the same way, there is no problem with matching seams and I am way happier with the results. If I were doing a block swap (which I generally don't do) maybe I would go back to "scant". I'm a much happier sewer and my blocks are more accurate just forgetting about the "scant".