I did not think they would last long, even after slathering them with polyurethane.
The birds never thought much of the Crosley Buccaneer. So it quietly disintegrated.. The birds found the Fiver much more interesting. Turns out it was not an eagle nesting in there ;-) but a bunch of Acorn Woodpeckers decided to use it as a store-house.
The Fiver is now bursting at the seams - filled to the top with acorns. When it was filled to the dial they began stuffing acorns through the cracks, which became wider and wider (it is near complete structural failure).
Acorn woodpeckers prefer location to tube count.