Hadza Help!

I’ve been wanting to make a replica (or as close as I can get) Hadza bow for a while, but there’s not much in the way of specifics online and in TBB Vol 1-4. I’m guessing this is due to the fact that they’re very rugged, simple designs, but it’d be nice to have some sort of information on wood types, finishes, etc. Can anyone point me to a reference or offer any tips? Here are a few specific questions I have:

• I live in north Texas, so I won’t be able to get an African wood. Do you think elm would be a good substitute? I also have lots of hackberry, locust, oak, and pecan around me.
• In photos I’ve seen, the bows are adorned in different ways—sometimes with cloth, other times with ribbon or feathers if I remember correctly. Is there are specific way to decorate bows or would it be personal to each tribe member?
• Is the profile perfectly round or oval shaped?
• Am I asking the wrong questions, and should I just get started? ha