Onebow, can I share a thought about this? The couple times I worked BW, I took Bakers advice about being elastic for it's mass, and overstrained it. Got multiple little compressions and some set.
Now, in light of what Joec123able said, in his post, what I THINK really happened is that the wood actually feels elastic. He said "spongy" but I remember it bending easily and snapping back easily, so I'm thinking ELASTIC, but not very STIFF.
So, because it wasn't stiff, I built them too thick, even though I thought I was wide enough, and mid to late tillering, they got beat up. Next time, I'm leaving them silly wide and trust how light the wood is to keep the tip weight under controll.
Keep in mind, though, that I think too much.....