There seems to be a wide variation in weight. Geistware what engine do you have in yours? The engine weight could be the answer if tail weight is needed for an engine like a G62. If the airplane needs nose weight with a DA50 the large variation does not make sense. Maybe it balances with a DA50 with no added weight over the normal radio equipment being moved. Jemo's seems to be a "normal" setup. I would hope the kits don't vary that much.