Well it all started when i first got my car. I took it out of the package put it together charged the batteries up waited 2hrs put batteries in it started it. i squeezed the trigger tires spun. I set it down squeeze trigger nothing happens. well i took it all apart then i pushed the crystal in the controller in and it's been working for a week. Now its doing it again and its not the crystal any clue what can be wrong???? should i just return it.