I had a Goldberg Ex-Treme 540 ARF untill it fell out of the sky. The OS. 46 quit in a hover approx. 20 feet up and fell like a rock.
My friend has one that has a Saito 82 and its lighter and flies great at half throttle.
So don't lose heart. Try it again. Not a bad deal for 90 bucks. I am.