I've been flying my Wonder for 5 years now. I use an old OS 15FP with a 7x6 master airscrew prop. The prop has lasted all those years. Flies about 15 minutes on 4 ounces of fuel. It's the most fun you'll have. My favorite airplane. As described be careful with the CG. When hand launching be sure you send it straight into the wind at about a 30 degree angle. Get some help on the first couple of launches until you are sure the CG is just right. As the fuel level drops you will want to put in a click or two of down trim so that you are not fighting the elevator to keep it level. Since this plane is so short coupled it is naturally pitch sensitive. Take it easy until you get a few flights on it then turn up the controls and have some fun. Good luck.

Lynn