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For those interested heres the guts of that chinesium RCA rotor. I tore it apart to add lithium grease and loctite to the motor screws to address its two most common points of failure shown on Amazon reviews. Happily I can report the gears and the pinion gear are both metal. There were some reports they were plastic. At least in my case they are not. Put it all back together but havent recalibrated or hooked up wires yet to control unit. The Maco V Quad is back ordered and working with a forum member here to get a push up pole so I am not in a rush. The housing materials are quite light and believe it to be made from a low grade cast aluminum if I had to guess.