Hi Sir...

I think I've got one of these but bought it used because it was a good buy with the Saito .90 flat twin. It is a good looking model but does not fly as well as a similar size Goldberg Anniversary Cub but it can be tamed to fly better with some effort. Whereas Goldberg shortened the wing a few inches (still considered full wing), the World Models is a few inches longer and suffers yaw with aileron unless setup with generous aileron differential. I've also some rudder mix on ailerons. Last but important... it is given to tip stall, but that tendency is greatly reduced by mixing some up trim to the ailerons at lower power settings.

Doing these three, turns the plane from a finicky performer to a tolerably good flyer.