Is there such an animal? I have tried 2 1/2 inch binding and sew a 1/4 inch seam and turn it over and machine sew it and the stitches are not in the ditch. So I have to match the bobbin thread to the back color. I have tried 2 1/2 inch binding with 3/8 seam same results. I have tried 2 1/4 binding with different seam allowances yikes!!! Any perfect width and seam allowance that will allow when you turn the binding over to be in the ditch?????