Tmk, I believe an unbacked anything is possible to make, given the right piece of wood. Will it be a performer? Up to debate for sure. I've made a few unbacked exotics just because folks on another site said it couldn't be done. The one that sticks in my mind is an unbacked bubinga board bow based from a Yuqui design from Bolivia. It's a bow, and it shoots and it ain't broke, but it sucks. Super slow and doggy. Ipe would for sure do better as it is less dense but.... Best of luck.