One of my favorite quilter gals is Mary Ellen Hopkins. As she would say, "That is YOUR measurement." Stay with it. My quarter inch foot gives a very generous quarter inch seam. Unless I've got a pattern where the quarter is crucial, I just go with my measurement. When I do need to make an adjustment, I either move my needle one place or use a focal point on the foot to bring my seam out a bit. I'm not quilting scientist. I try to make it fun. My quilts do have inaccuracies. But I'm having so much fun. I hope you've relaxed and are having a better day.