Been flying one of these for a while now. Built from an arc kit about five years ago. Saito 91 FS with Master Airscrew 14-6 for power is quite sufficient for docile aerobatics and will fly around without effort at three quarter throttle. Overall weight dry is 10.2 pounds. Using one standard servo on ailerons, two on elevators and pull pull rudder. Covered with 21 st Century white fabric. Required 5 oz. of weight in the nose for balance. Has proven to be a sturdy reliable flyer.