My grandkids lost my CF wing spar and I can't find a replacement CF tube that is the right size. As I am just beginning with the plane and am no where near a 3D flyer, I have a question. I found a 1/2 in hardwood dowel that is very stiff and fits snugly in the fuselage tube and the wing rubes. I know that I am paying a weight penalty, but would this be a suitable substitute for general Sport maneuvers?