JW, my plan included backing the bow with something that is strong in tension--probably flax, because it's supposed to be even lighter than wood. Then, you would hopefully get a serviceable amount of compression in the belly (because of the trapping), and you might also get the benefit of the light weight and extremely tension-strong flax.
If the combination happened to work, I would think that you might end up with a really light and fast bow because of all the mass reduction. The flax would also probably keep the bow from smacking you in the forehead or gouging out your eyeballs when it blew up.