I have a razzle 60 3d.. and i was just wondering how tail heavy should i make this plane..? because i cant seem to get a good hover, knife edge, or harrier, or anything else. it may actually be a little nose heavy. would that be why its so hard to hover and stuff..? and i am running all standard futaba servos, no heavy duty servos.. does that really matter a whole lot? thanks for any help.