I have Powerball Techno which is less than 1 month out of the box and in the last week it has developed an alarming tendancy. It rattles loudly and vibrates to a point where I can feel something inside the mechanism when I am accelerating it towards 10000rpm. If I let it sit in my hand and decelerate naturally it seems to function normally. It was not dropped to my knowledge. Any ideas? Is it defective?