Wallyb70--I have a friend flying a modified kit Laser--bigger rudder etc--with a Brison 3.2 swinging a 21/8 Mejzlik--94 inch wingspan--not sure of the weight-probably 17.5 lbs or better--flies like a champ--not blazing vertical pullout from straight up hover but plenty adequate--and he does not mind sweeping the grass with the rudder