Old Fart on wooden props, apart from lack of "weight" the biggest problem is hub compression. Most prominent with single nut applications. Better with multiple bolts through hub. Oil and water contamnation is next followed by the obvious splintering. If they last long enough the hub compression leads to shaft runs and all sorts of other nasties. Similar problems with full size a/c. However they look nice and you can generally turn "larger" props than the plastics and composites.