If you watched the video of the jetranger flying, twice it tips back and looks like its going to reverse into the ground, I saved it both times or it would have. I have been wondering what could cause this, I wondered if it was pendulum action of tail boom as I pulled back slightly to slow down. It is slightly tail heavy now I have the cockpit down to 30g. I wondered if it was because the horizontal fins are entering the downwash from rear rotors and being forced down. I flew it after I snapped the tailboom off, actually looked pretty good, never did the tail slide thing either. I will try it without the fins, they just slide onto a 1/16 balsa joiner, I have snapped 3 of them already, none from flying, all hanger rash. My tail rotor doesn't seem to want to freewheel like I thought it would, I did think about motorising it off my spare channel, but I never made provision for that when I was building it. Looks good when it's parked. I also wondered if my quad rotors are too close fore and aft, the Seaknight has same width over rotors but lots more length. Seaknight is 17. 5 inches, jetranger is only 9. Its a short pitching moment compared to the Seaknight. I suppose everything has its own traits. Still well happy with it, even with its funny habits, I am still amazed by how light it feels, the last jetranger I had was Morley mx ranger, weighing in at a hefty 8lbs plus. It needed a 45 engine to get airborne, mine is 3/4 the size and gets airborne on four small motors and a 7.4v 850mah battery! For about same length of time. In the living room.