Guys, be sure to tell all the newbies and veterans in the hobby to sand the edges of the props. Remove all the sharp edges and flash from the wood, nylon, and glass props. This could be the difference between a mangled finger/fingers, or have them cut clean off !!! As shown above, engine size does not matter. The electrics are just as bad if not worse. They have the same power and can start unexpectedly! We have or will be cut by props at one time or another. Like the box says, "THIS IS NOT A TOY". Ya'll be careful out there! Paul