Here is a picture of a Wonder that I built. I should have never sold it, and have another in the box and plan to build it when I get a chance. It was quite fast with the MDS 18 and tuned pipe. It flew with an 8x4 prop. I am not sure what to use for a motor on this one. I am considering an electric brushless setup and the Magnum 30 four stroke. I noticed Magnum is also coming out with a redesigned 15 and may go with that. I have flown another wonder with the norvel 15 and that motor was a nice runner. I may also put a piece of music wire on the bottom skid to help with landing on the ice in the winter.