[8D]If a plane is nose heavy if will fly poorly, but if it is tail heavy it will fly once. I always try to start a little nose heavy and slowly remove a little nose weight. I have a TH Kaos that was very nose heavy with a Magnum .52FS until I added several ounces to the tail. I think it is designed around a .40 - .47 2-stroke and the conversion to 4-stroke power was a bad idea. I have another that I will build when this one bits the dust, but it will definitely be 2-stroke powered.