I love your quilt! The way you did the colors is really great! I also have used sheets to back my quilts, I know some say not to do that, do to the tight weave of the sheet fabric, but I have never had a problem with it...Plus, I had ordered in some high thread count expensive sheets, and they did not fit dh and my bed at all (we have xl twin adjustable beds, the bottom fitted sheets are separate, I use 1 king sheet across the top. Its so hard to get high quality "soft" sheets that fit right) Anyways, I just had to figure out something to do with those sheets, so used them in a couple of quilts...and the backs are really soft on them now, too...
K