If there was a flat fell foot available for my older Bernina, I would definitely give it a try. Currently I use the blanket stitch to finish my bindings by machine. What would be preferable is a feather stitch (or other decorative stitch) that does not have a line down the middle. My older Bernina does not have that, but many of the newer machines do. When you don't have that central stitching line, small deviations are not at all noticeable.