I did that on my last quilt. There's a book dedicated to that idea, but I can't remember the name. My fabrics on the front of the quilt were so busy, I couldn't imagine being able to see what I was quilting, so I chose a backing with the idea that I would use that as a quilting guide. The only problem I had was that I forgot my plan when basting my quilt, so I had to reach under to remove my basting stitches, which was kind of annoying. I did have concerns about tension, but it worked out fine.