Laying out the rear spar for the left wing and applying the modifcation to both. The right wing rear spar is fitted to the ribs and top skin. So de-rivet the right rear spar and then construct them both back up including the modification. the modification includes a doubler to the top flange along the full length, an extra doubler at the root and doubler over the ailerion control horn hole mid span. I also need to create a hole at the outboard end for the ailerion counter balance weight shaft to fit through.
Left Rear spar aileron control doubler
Left Rear spar root doubler
Left Rear spar aileron control and cap double running along the top
