Kaye has a sit and sew at a lot of shows where folks drop in and work on the 6 hour quilt for charity. Last I saw she was still using a lowloft polyester batting that is bonded? and to me, rather stiff? You can buy it off the roll at JoAnns. I had a friend try this quilt with warm and natural batting and she had a difficult time keeping the batting smoothed out so it wouldn't bunch up at the serged edge. So, perhaps a shot of basting spray might be in order if you use a soft batting.
Kaye had some folks cutting, some serging and some binding. It was like a factory assembly line.