I have inherited a fifteen year old basket case, it is a gret planes .40 size cub. There are no instructions, but thats o.k. the plans are there. the question is, the plans are indicating basswood spars, I think this maybe over kill, would balsa spars in the same size suffice? Seems like all the other kits I have built have had balsa spars, or am I remembering wrong? A lot of the pieces are missing but I have a box of repair wood I can draw from. If I was home I could look at other plans and maybe answer my own question, but I am at the home away from home four states away.