I've got another option for you. Leave the original wing alone and build a second wing for it. I'm doing that for a Sig Kadet Jr, with a few other modifications. The plane is designed for three channels, with out ailerons. I'm adding ailerons, 3" to each wing tip and a solid mainspar full span. I figure I'll get a little more lift, but have been told the plane will be more likely to sideslip any time it's banked.