Need help please. Making a DF quilt. Have the five blades sew together, 8" tall for each block. So how big do make the background that I will applique the fans to...and to I cut the fab away from the back where the blades are so it's not so bulky? Not using a premade pattern. Just have template. This is a UFO I want to get done by Christmas. Gift to me from me from fab given to me by a friend...thank you Joan.