Full scale aerodynamics do not translate to models. That little stall strip in the photo might help make the stall start at the root of the full scale, but it wouldn't do a thing for a model.

Think about it. A tip stall is caused when the tip stalls before the root. The purpose of a stall strip is to make the root stall sooner, so that it stalls before the tip does. That means the stall starts sooner (at a faster airspeed) with the strips than with out them.

Jim