Yes, I did use a batting (Quilters Dream Orient again!) and that IS a wonderful flannel. I believe it was from Fabric.com but selvage gives no information! Plow ahead with your and be happy with it!
Really, really cute! I'm working on a disappearing 9-patch for a baby right now, but I hit a snag regarding batting/backing. Is your backing flannel? Did you use batting? I really need inspiration to finish. The baby is due the first week of June.