where the boards are is vital, like bamboo for a back and ipe for a belly, some woods are very good compression horrible tensile(sp?)(pulling) stress and visa versa
there is alot of guys here who can help, running it past these guys in a post may save you a big pain... I dont know a lot about it but i do know. hickory and moso or tokin Bamboo are popular choices for wood backs. ipe for bellies. ipe is not hard to get just gota find a place that sells good decking boards. that is its most common use around here. also you gota be careful about too strong a back as it can crush the belly wood. ask for a recipe on here and i am sure you will receive. i can tell you 2 layer woven fiberglass back will crush a thin oak and maple belly. (i broke one just like that after drawing it to 36", i was figuring out where it would break...)