The true angle of attack on those stunt jobs is so small that you will have a tough time seeing it unless you really look against some referrence .
Airfoils will still be a mystery for many, as long as those old "fact" books are still around .

What most don't see, is thaall of those "highly specialized shapes and thousands of scientifically designed wind tunnel researched etc.,etc., are nothing more than shapes which under finite conditions work a bit better or worse than one with a slightly different finite condition.
Quite a few full scale aircraft were used at flying speeds and loads which kept the wing on the ragged edge of simply not working.
On our models the airfoils are very forgiving--because the angles they work in, are so low.