i used a piece of broom handle about three inches long with a square 2"x2" piece of 1/4" ply epoxied to the end of it, makes a great base for attaching any brushless outrunner motor to it. it is only zip tied down and have never lost position of a motor with it. I just installed a 3800kv outrunner motor and a 3cell lipo on it, test flight tomarrow .