All of this is very good to know. I've had to un-do a few mistakes in my day, but usually I catch the bad stitching within the first row of my quilting. The last one I did, I thought...maybe it would fluff up in the wash or maybe it wasn't really that bad, but a friend, non-sewer, asked me if I was happy with it the way it was and if I'd be proud to send it to a customer knowing it wasn't perfect...No. I ripped out the stitches and when I re-did it, it was lovely and I was very proud of the way it turned out. It's a good learning experience for the quilter and the topper.