Since you guys are talking engine issues here. I have this new Saito in my plane with the tank in the nose, no pump. It 3D's GREAT but when I get a waterfall really cooking it will go deadstick on me while inverted at some point almost everytime. It will ke spin, blender with great inverted flat spin, even pseudo lomcevak with no engine problems. But you start it flipping over and over in a waterfall, it may be the 3d or 10th or 30th rotation but eventually the engine will die. Any suggestions?