You don't, Just leave it in place and double it up with a second joinner. I faced the same issue with a 4*60 wing that I aquired. Some one had started the kit and at the point of joining the halfs together, they got baddly screwed up. After a while, I just sawed the wings in half. I cut new center ribs as there wasn't much left after the saw job. I open up the bottom sheeting and then using a soldering iron, heated and cut away any epoxy along the edges so the new brace would fit snug to the old one. Once I got the root ribs in place, the rest was very easy. Just like joining a pair of ARF wing halfs.

The reason to remove the bottom sheeting behind the brace is that the airfoil is flat there. When you have the two halfs joined and even, the use long sheets of balsa that will span the center section of both wings. This gives you some added strength.

I lost my second 4*60 with this wing a couple months back. It went in from about 200ft straing down. The fuselage was teeny tiny sticks. The wing was indented about 1 1/2 ' where it pushed forward into the fuselage in the crash. A couple of the little 3/16" spars snapped, but the wing was basicly intact. I'm not sure if I would trust it to fly again, but I haven't junked it yet either. That repair will be as strong as your first wing, maybe even stronger.

Don