even if you were to keep the under camber wings i would replaced the wing struts with the larger diameter material. also i would install a solid rod inside the tubing that connects the lower strut attach fittings . i did installed the larger classic rudder and make the vertical stab taller to match the rudder on my early model 4. also the larger elevator would be nice. wish id done it on mine. be sure to install elevator trim, its well worth the trouble.