Originally Posted by amma
The X helps to stabilize the block, keeps the flannel from stretching (it is stretchier than quilting cotton)
You can do other designs in the middle too... circles, large stippling, etc.. :D:D:D
I've done a zig zag stitch X on mine and I have used flannel for the batting if you don't it to thick or use batting and cut it about a 1/2" smaller than the square. That way your seems aren't to thick.