You still sew it the same way you would for the 5 inch block. The center will just be a little larger. Press it flat - like you would the smaller block. When you put in the 'window' piece, and fold the background block edges, I would sugest that those be machine stitched. That will secure the entire piece. I will do one tonight and post the pics.
Blast these double posts. Those October Gremlins sure are BUSY!!!!