I'm the same as Maryb119 & AnnT - I just do it automatically - I only do 2 possibly 3 stitches. I have used leader enders when the fabric is fine or thin to prevent the beginning edge of the seam from getting swallowed into the needleplate hole. It adds weight to the beginnig so that the bobbin thread doesn't pull the fabric down. Never thought of using it to stop backstitching errors- will have to try it.