There is an extra wide backing fabric on the market designed to just exactly what you are doing! Has a design printed on it and you FMQ following the design and the design washes out afterwards (I think). See - you are on the cusp of innovation!

What a great idea and beautiful quilt.

Wonderfull idea.. on a super patchwork. The frenchy appreciate !

very nice you doing good job!!!!

I like it. I think that is a very creative choice. Beautiful colors and stitching.

Looks great!

awesome.....be sure to post the finished product!

I love what you did with the quilting. I have often though about doing that .. you have given me the courage to give it a go. Thanks for posting.

Sounds like it was the right move

I think this is a cool idea when you don't know how to quilt the top. I think it is a wonderful way to have a double-sided quilt.