Largest one I have done was a double bed on my Janome using SID and outline quilting. I did use a walking foot. I started it 1 week after I got out of the hospital after having mastectomy and reconstruction and finished it in 2 weeks. I felt like it played a huge part in my recovery because it kept my arms moving (wrestling) the quilt and made the recovery quicker. The surgeon said she had never seen anyone get as well as fast. The quilt was a wedding for my nephew. I was very happy with it. I'm not a very good FMQ'er however course if I practiced it would help, lol.