I have had run-off be a BIG consequence on the belly, both onsage and massaranduba, when I couldn't see how bad the radial grain ran off. Both of them just fractured on the belly, where the grain just split and slipped over, creating a lip like a spalt.
BUT! That run-off was actually pretty severe, like 20 degrees or more.
If you are cutting the strips to make "action-yew" yourself, you'll be able to saw and inspect as you go, and force curved pieces into line so you follow the grain better, etc. I see success in your future for this! The whole point of Actionwood is consistency, and averaging out small flaws.