Hi Randy,
I am at Singapore
Yes, I do agree that thick wall is not necessary, but Mature boo with well formed power fibres is important..............
I am no expert in making bows but have seen enough of videos and books on bamboo bows, l remember from some where
I heard a bowyer mention the nodes are like "old broken bones" if a bow were to break, it will be at the node area.
So , I think it will make sense to get Boo that has as far node inbetween the better...................RT