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I basically use the method in that tutorial but I stitch around the two long sides and one short side with my serger before birthing the quilt. I also make the batting between 1.5 and 2 inches shorter than the rest. I turn the excess fabric inside to enclose the batting and pin baste all around the outside edges and every 4 inches or so across the whole quilt. I use open safety pins as they are easy to remove and less strain on my already worn out hands. I then machine quilt every four or so inches with a decorative stitch and varigated coordinated thread finshing by stitching about a half inch in from the edge to create a binding effect. I have made hundreds of such quilts for our local Linus project. I rarely bother to piece. I just use a child friendly print on the front and a coordinating solid color flannel on the back. If I use a printed flannel I use a solid cotton on the back.
I apologize for my first response. Obviously I didn't understand the "birthing" quilt creation method. Now I understand! Disregard my entire earlier post. (Can posts be deleted?)
"You can't help that. We're all mad here." - The Cheshire Cat from Alice in Wonderland.
I prefer to stitch with the batting on top, but have done it both ways successfully. I press the edges flat after its turned, then top stitch all the way around to keep it in position. I normally just tie birthed quilts. I have also only done this on baby quilts, and one lap quilt.