I am planning on building a bass with my local luthier, thinking about Fodera Monarch shape or Pedulla MVP. There's a pile of mahogany, koa, body core wood and how in the h*ll do you pick a tone wood from the pile. How can other luthier tell if that wood will be a good tone wood and how do luthier grade their wood from mediocre to "master grade?" I read michael tobias's little essay and there's a rough guideline regarding weight, color, age, etc. But how do luthier guess the tone of the wood before the bass itself exist?