See what I mean nimitz? All kinds of experiences with them good and bad. I'm one of the guys that likes them an have good running ones. I have worn some out and they don't have the life of some of the more expensive engines, but proper feeding will give acceptable life for fun flying. I've chromed some and they are wonderful engines that way. You may yet get some very glowing reviews. My suggestion, use it and form your own opinion. I do need to mention this though, the late George Aldrich told me that the McCoy was a better stunt "design" then the Fox, meaning had the McCoy been well built we'd be using them and badmouthing Foxes rather then what we do now. I agree with him, having used McCoys for all these years.