I have 1/4" foot for all of my machines. However, I still had problems with getting a perfect/scant 1/4 seam. Now, I now use the Patchwork Seam Guide from Bonnie Hunter and a metal screw-on seam guide.
The Patchwork seam guide is a small acrylic like rule. You place it under your presser foot and drop our needle in the desired seam size (scant 1/4, 3/8", 1/2", 5/8" & 3/4). Then you attach the metal seam guide to the bed of your machine (if it has a screw hole) butting it up to the Patchwork Seam Guide . If you have a machine without a screw hole, then you could use a sticky back seam guide on the bed of the machine.
This gives me a more accurate seam.