Murphy's law applies here, just like everywhere else
I was running a G62 on a test stand with a NEW 22-10 Zinger prop, never used on an airplane. It was bolted TIGHTLY on the engine...It broke when I brought the rpm up...
Sent it back to Zinger, no reply other than they sent me 2 new 22-10s...
Apc made some 3 piece props, a metal center with replaceable blades..A few came apart, they quit selling the props..