I got some spalted tamarind logs from a mango grower I got to know (also have some mango logs he saved for me) and it is pretty spectacular, but (I have not resawn most of it) it is probably going to be a bit too narrow to make a tenor. I’m thinking of trying a 3-piece back, like some older guitars. Something like a piece of curly koa as a center triangle, and black & white spalted tamarind for the other back plates and the sides. Like this:
