You know, I have sometimes been astonished at how strong a bow turns out using certain pieces. And other times the opposite occurs.Just give it a try and see what happens. It's hard to tell what the yield will be from the wood, until you try it. Then you'll know that board. The other thing is the bamboo you use.As mentioned alternate the nodes, and you've tempered the belly so it will be quite strong.You can make it wider to start and then narrow it if the bow is too strong.But as I said before, there are limits.All the best.
Steve