I was looking up some info and found this tutorial on Youtube! Looks like it could be Very useful! Especially if you do not have a even or smooth surface for quilting. Great what you find when you're not even looking for that!
https://www.youtube.com/watch?v=tl5pbuFeHHg
Ordered one with my Christmas Amazon gift card, so if no-one else has tried it then I will let you know!