Well guys a tailheavy plane flies once,a nose heavy plane flies again and again. That’s the rule. I balance my S-1 and S-6 at the down line on both planes. Sense I’ve repaired my S-1 several times the weight has built up. But I still add nose weight. I am not a proficient Flyier. So the AMA route I do not do. But fly for sport only, and just try to keep them lines straight and tight.AJ