that technique is a great one!
i tend to make my raggy quilts that way- i do not generally use batting just 3-5 layers of fabric depending on the fabrics- if i'm using a really nice double sided flannel i may only use 3 layers. if the fabrics are thinner than 4 or 5.
and yes- the starch really helps- especially if there's any homespuns or loose weave fabrics in the mix.