you may want to ask this in the aerodynamics forum but after flying the original falcon 56 for 4 years and still have it today .i really do not see what you will be gaining with the addition of the wingletsbut this is a hobby so if you want them go ahead ,just wondering what type of performane you are expectinf to improve.when i built my falcon back in the fall of 1970 it was covered with silk and dope weighed 5 1/4 pounds had no steerable nose gear and used a os 35 with muffler and a 10/4 prop and it was flown first sat in january 1971 with a kraft series 70 radio using kps 11 servoes.soloed easter weekend of the same year and added steerable nose gear that summer and installed a new os h40 p engine and removed 8 ounces of weight under the fuel tank.now could do aerobatics using an 11/6 prop