BTW, there is a well known and understood "trick" in the design of C/L precision aerobatic model design. It's most often employed with tapered wings. Increasing the thickness ratio toward the tip is the trick. And it isn't actually a trick at all. It's simply a sensible use of aerodynamics. As thickness is increased, so does the stall AOA. It's actually nothing more than "aerodynamic twist" being applied.

In fact, the wing may or may not increase in thickness. It all depends. What happens is the taper shortens the chord of the airfoils moving toward the tip. So if you don't decrease the thickness of those airfoils at the same rate you decrease the chords the ratio of thickness to chord increases. Taa daaaaa.......

Lots and lots of C/L stunter designs fly better for it.