It's a good idea to go over every screw on ANY factory built rig,,,Quick word of advice check the set screws on your cvd's and drive shafts. I had two pins to fall out just running around the house. LOSI, LOCTITE IS CHEAP;-)
in the heli world if you crash your ship and complain about the loose screw from the factory NOBODY blames the factory,,it's the pilots fault for risking his whole heli because he did'nt take the time to go over it,,,,
with crawlers you loose a screw ,,,,well you get pissed and have to find or buy another,,,
with aircraft a loose screw,,,,,,it can cost you EVERYTHING