So I've worked on it a bit more, checked it with the tillering gizmo and I'm pretty happy with it. It seems to be doing wonderfully.
I've also done much of my weight reduction and tillering by trapping the limbs - except I've apparently done this backwards from almost everyone and made the belly the smaller side.
Mind you, I don't know what this wood actually is, and it seems to have worked great, but is this a reason to worry?