I have started making the wing ribs for my 62" Lazy Ace. I want to keep the plane as light as I possibly can. Just as Kevin suggested. 10 of the ribs require having holes in them for the aileron wires to the servos. Will it be OK if I put these holes in all 44 ribs to save that weight and the wing still remain strong? I read to use aircraft plywood ( stronger) for the firewall instead of balsa ply. Is this a good idea? I am planning to use the Klett main landing gear, do I need to put toe-in on this, if so how do I do this?

Thanks