You are right Dan, Osage and Yew are completly different when it come to ring violations and what is prefered as far as ring thickness goes.
With Osage I prefer thicker late wood rings and thin early wood. Thin late wood rings usally make the early wood late wood ratio go towards more early wood, because the early wood ring is usually not proportionatly thinner.
Also I personally try not to back any of my stave bows......so to me, if this was the stave I was working with, I would just chase a ring.
The comparison to yew was just meant to say, thin rings are harder but with the right tools in the right light and some time on your hands it is no big deal.
Mark