My FETS (flying engine test stand) is a scratch built enlarged Ugly stik. I have a set of the original Ugly Stik plans on CADD and can make them any size I want. The wingspan is about 80". Big and boxy but flies like a Stik. Just perfect for these 25-31cc conversion engines. I like how it flies so well that I have started taking it out to fly just for fun. The photo shows the business end. I use a universal mounting plate so that I can mount about any engine. There are two throttle servos so that I can have carb on either side of the airplane.