Mine is 11 years old with a Saito 65 and 2 oz. wt. against the firewall along with the battery verticle right behind it. It's a tail dragger and has servos on each aileron I added along with small split flaps of 1/16 ply, fiberglass main gear, about 3/4 oz. wt. in one wing and aluminum tube struts. After a crash I stripped the Coverite fabric and recovered with MonoKote. Weighs 6 # now exactly and flys great.