Hi Screaming Injun. Do you have wing struts on your's? Are they needed? If you don'r use them, describe the wing spar you are using from a strength point of view. I still have the wing struts from my two crashed basa Sig J-3 Cubs. I'm planing on recycling them on the CoroCub. My main interest is to prevent having wing tip washout. I feel that is what causes snap rolling on a poor takeoff or landing with the J-3 Cub.