When I load the quilt top I stitch across the top, as I advance the sandwich I stitch down the sides, basting everything in place. When I get to the bottom I stitch (bast) across the bottom. That way when I remove the sandwich to turn it and quilt the opposite borders everything stays in place. After I remove the quilt from the frame I do trim the backing and batting 1 inch beyond the quilt top. (Unless this is a first time customer) This makes it easy for my customer to apply the binding width they prefer and to have plenty of batting inside the binding. If it is a first time customer I usually do not trim the backing and batting unless they request it. I always return all extra or trimmed batting and backing to my customer.