Good evening Ken. Quick question for you, Is there somewhere I can look up how to swap my trainer when I am done training LOL into a biplane? I read on here somewhere where somebody did that. Anyway it sounds cool and I would like to find info on it. I had to swap out engines the OS40LA just would not pull the plane up with outa good head wind. I ended up buying an Evo .46NX BB engine. It should be usable in my next project and after talking to horizon I dont have to worry about breaking it in. I am going to run the cool power fuel it runs cleaner and they guys there said that it was fine to run in this engine with no worries. I appreciate the help yourself and brett haven given me this has been just as much fun as the heli for me. Have a great day. Mike