One thing I wish some one would have told me is to attach the inboard hinge and the far outboard hinge then pull a string line under the flaperon to set the other two. You do this because if your a tiny bit off. when you move the flaperon up and down it will bend the trailing edge of the wing up and down. I noticed that when I did mine. so I pulled it off epoxied the holes shut and started over. Live and learn I guess.
I think a guy could make them work if you wanted to take the time to actually tune them. I use to use them on sleds all the time and holy cow did they make the 2 strokes come alive from bottom to top. But you would probably toast a few engines before you got it figured out.