Hey Victor, we all come here to learn, so...
If you'd really use this jig to steam in recurves you more than likely will ruin a stave, cause you will end up with humps, dishes, at least one serious hinge, as well as a twisting back of the bow. At least you should go to a carpenter's and get the surface sanded parallel and smooth out the line.
But honestly, I think it is too much of a curve: I can not really remember having seen many bows here in the past few years, be it self or laminated, with that type of curve of a typical FG recurve! This will be REALLY hard to balance, at least it would be for me.
JMO.