Thanks! I like the green wood idea, but green oak limbs are in short supply here in soCal. I know a guy in upstate NY who likely has some sticks, as he has all kinds of firewood that he harvests. I'm almost ready to make the thing by building it from laminations. But whether it would stand up to the rigors of use, I don't know. Probably, though.
What little understanding I have of the process is that the wood gets compressed at the outside edge, or it may/will break. Haven't spent a lot of time on research, since the knowledge is here.