I just finished my Kyosho Zero ARF 40. I did not install retracts. I am concerned with the CG. The manual says that the model should weigh in at 5.7 lbs and it did. However, I had to add 8 oz of led to the front because the model was tail heavy. My guess is that the 8 oz of led is needed to make up for the missing retracts and extra servo. Has anybody had this problem?

Thanks