How wide is your facing? I just made a walllhanging like this and attached the top of my sleeve to the back at the edge. I made the sleeve so that the facing would not cover the ends of the sleeve. Then I sewed the facing to the front, catching the sleeve at the top. I then sewed the facing, making sure to go through the sleeve but not all the way to the quilt. Finally, I hand sewed the bottom of the sleeve to the quilt back. Hope this makes sense!