I have the stinger 120 with a Moki 180 glow engine on it. It is a fine plane but there are better options for 3d training. The stinger is relatively heavy. I first built mine with the long wing (80 inches) and have since chopped it off about 9 inches each end. My favorite plane in this size range is the Morris Giant su-do-Khoi. This is a very good plane to learn to hover. Another good choice is the Aero-works Extra 300L profile. I have had them both. I'm not sure if these planes are available in ARF form. Mine were built from kits, and they are moderate to advanced builders kits.