Flaps are a good idea. Since I lost my elevator in the air on my super cub (scared the hell outta me), I have been a flap fan. The flaps on the super cub helped me bring it back safely to a normal landing becuase they tend to pitch the plane up. Now, I don't know how they will perform on a 40 size plane, but I think they should help too. Just my $0.02
Victor