A lady who use to sew for fashion designers showed me this trick to sewing long seams. Hold the top piece of fabric up high as it feeds under the foot. She put the top fabric on her shoulder and held it up that high. It eases in the fabric at the same rate the bottom fabric is being pulled through. It works great to keep the bow from being so noticeable when sewing a lot of strips or long lengths. And another tip that she showed me when sewing very thin or slippery, satiny fabric was start sewing in the middle to one end then flip the strips over and sew from the middle to the opposite end.