If I don't start really watching about 2 inches from the end, I wander off so the seam is too narrow even though I always use my 1/4 foot. Then I give it a good W Texas cussing and resew the part where I started wandering. The friend who does my long arm quilting tells me this is a common problem. Not the W Texas cussing but the wandering at the end of the seam. Be patient with yourself and vent with words like geewhillikers or oh fudge if you don't know any W Texas cuss words! froggyintexas