I would do the Baptist Fan for the interior. Stencils are available for various sizes of fan. I would suggest the 12" fan design. Would do a small curvy design in inner border as drawn and then a cable design for the outer border. Stencils also available. I recently did this on a similar quilt and it worked great. Of course there are lots of starts and stops for the fans but easy to bury the thread tails while watching tv. I used the Spiral Eye needle for burying the threads and it went fast. The Fan gives it an old fashioned look and is very easy to do with walking foot as are the other two designs.