Besides using my Davis for attaching binding, I also straight stitch quilt with her because of that wonderful walking foot. Sometimes I have noticed that the stitches have loosened; those are the times that the tension dial has moved to the loose setting. I have noticed that the vibration off of the machine has cause the tension dial to shift. This isn't caused by the treadle since treadling is smooth and quiet. I just check on the tension dial setting with the start of a new row.