Julie - firstly I am amazed (and jealous) of your progress. Given that this is your first from scratch build it might be worth just plowing through with what you have and getting it done so you have one to completion and apply what you learn / mistakes you make on the next build and make that "the one". Sometimes those Franken-guitars with seemingly mismatched parts end up looking really cool.
Another thought, while I don't have a ton of experience with jatoba, I do have some and what I have observed is that it is: HEAVY, splinters easily, and has a tendency to warp or twist more than other species I have worked with so you might be inviting unnecessary problems using it as a fingerboard. I have had seemingly straight and stable boards twist as they are being ripped on the saw. I have also had freshly face-jointed boards come out of the planer very twisted. Just a thought though - ymmv.
Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us.
-Bill Watterson
Reminds me of my safari in Africa. Somebody forgot the corkscrew and for several days we had to live on nothing but food and water.
-W. C. Fields