I just put binding on my DP9 yesterday. I cut it at 2.5" and folded it in half. I trimmed my backing 1/4" past the quilt top. When I sewed the binding strips with a 1/4" seam aligned with the top, I had 1/4" extra to "beef up" the batting. I do not use the continuous binding method, rather I use a double-mitered binding. I machine stitch the front and hand-stitch the back. It came out dang near perfect.