I have probably 50 flights on the A60 20S. You must support the back of the motor or else bad things will happen. The mounting method is the old bad thing about this motor. The Hacker alum "erector set" mount is too heavy - about 7oz, so the only way to mount these are to nose ring mount it and make up an "X" shaped bracket with a bearing in the middle to support the rear. Without this rear support the nose will get torn off. Several of us can give you first hand experiences with crashed planes. But this is a very strong motor and a good choice for an outrunner.