What does your Funtana 40 weigh?
Mine weighs 6 lbs. 3 ozs. with a Saito 91 and JR 537 servos throughout. At the moment I have a homemade much larger landing gear made from 1 1/2'' aluminum stock, waiting for the cf gear come available, it weighs about 5 1/2 ozs. by itself, plus 3 1/2'' wheels to deal with our gopher hole laden field. Please note your motor type and size, servos and any changes to original plane.