70mm EDF Brushless Power System

This fan came in my new Hobby lobby F-35. When testing servo functions during assembly, I advanced the throttle to no more than 1/4th to verify correct motor direction. I heard immediate unusual noise and shut it down. Autopsy showed fan spinner split into two pieces and 3 blades damaged. No other damage. Will replace with HET 6904 and upgrade to 2W20 motor with 60A esc because I can't trust that a replacement Hobby Lobby fan wouldn't do the same thing as the original.

(Note from Hobby Lobby - that will happen to any fan where the spinner screw is overtightened)

Norm J