John is right, however a caution about using a 'stall generator' at the wing root. As a fix it simply means that the airplane will stall at a higher speed/lower angle than before, that is, before the tips get a chance. This can make landing and slow speed manuvering even more difficult. On full size, as often as not, they are used to provide a bit of turbulence at higher AOA's so that the pilot fells a bit of a bump through the controls, a 'stall warning' or stick shaker, just to indicate that he's reaching the limits. Some full size aircraft will stall without much aerodynamic fuss, hence the use of the leading edge addition.
Evan, WB #12.