I have one that broke in half on me right behind the wing (very rough landing) I have since rebuilt but I lengthend the tail end 2.5 inches and recovered the canopy hides it all. I am going to put an OS 61 FX on that one should be interesting to see how it flys ! I have a 46 AX on my other one and it has more than enough pullout from a hover. I am running 20% nitro in it though.