Here is my bird ready for her maiden,O.S 46 AX, Ram Nav lights and Ram landing lights controlled by servo on retract switch......lol. My only problem occured when it came time to balance her, the instructions say 68-73mm mine is balanced at 78mm which is 31% of the wing cord,I have always balanced all of my airplanes between 28% and 33% of the wing cord. Here is the kicker even at 78mm i still had to add 6oz to the nose and that has me concerned. I read were Tracon added 6oz,but his was electric, I don't know why mine was so tail heavy I have 2 9 volts for the lights and the reciever battery are all under the gas tank as far forward as I can get them. I did nothing to the back of the plane.