Someone posted this website recently that shows how to do Quilt-As-You-Go in rows, and without sashing. She has a photo tutorial and a Youtube type tutorial. Not sure how it would work for a Double Wedding Ring, but .......
http://www.candiedfabrics.com/2013/0...ing-as-you-go/
Edit: Just wanted to add that this method requires no hand sewing. It's all done on the machine.