Hi all, the last Kitfox 1s, and the Kitfox 2 model were built with a wing spar that was not a tube but rather an extrusion. It was the same diameter as the tubes, used in other models but it had a full length center piece that stiffened the tube. I'm guessing they were more expensive than the tube and stiffener that Kitfox stayed with on the model 3 and since. But likely they were stiffer, and may not have flexed as much. All this is leading up to the question. Has anyone rebuilt a Kitfox 2 wing and replaced the front spar with a standard tube and stiffener while retaining the older style extrusion spar in the rear of the wing? Here is a view of those spars as was used in the Kitfox 2. Thanks, JImChuk