It's really too small a plane to worry about finessing the aerodynamics.
This is my long-suffering Goldberg Mirage with the wing on upside-down AND backwards!
Other than having to reverse the rudder to have any control at all due to the inverted dihedral, the plane flew. Not well, but it did fly.
With the wing mounted right side up but still backwards, it flew well... for a Mirage.
All you need on these small airplanes is a curve to change the direction of the air flowing, front-to-back.
Flat plates do it with alpha..