A consistant seam is more important to me that worrying about scant measurements. Find what works best with your project and then just relax and enjoy the experience. Too many up-tight people in this world to worry about things like that. I have Janome machines and any of the 1/4 in feet I have work with whatever project I'm doing. My grandkids and friends are not going to measure the seams, just love them. Sometimes to rags and that is much more important to me. Relax. Enjoy.