Lets take a closer look at 3d setup and trim, last year a friend showed up with flip 3d with os50 and wanted me to fly it. I took off and noticed right away something was wrong because it flew hands off straight and level. when I tried some 3d stuff it was too pitch sensitive and very difficult to maintain a hover, in other words it was nose heavy balanced according to plans. we moved the battery from firewall to tail, when I took off for the second time it ballooned into a hover right away, was very stable and predictable for rolling stuff and it flat spined nicely, slowed much better, now it was a 3d plane. I handed it to my friend, he was all over the place, scared to death, he could not land because when he slowed down the nose would go up and stall. I reached over and put in 4 clicks of down elevator trim just for landings and takeoffs, now he made a nice slow smooth landing. I explained to him that 3d type airplanes with 3d setups require that you fly them "ALL THE TIME" there is no resting points in between maneuvers. I convinced him to try again but to fly the airplane at all times as if a servo was stripped. by the end of that day he was doing slow high alpha rolls using just aileron and throttle mainly, he noticed that slow rolls no longer required down elevator inputs when inverted, this freed him up to focus more on rudder inputs on knifedge. by the next weekend he was a completely different person hovering, flat spinning, he was happy like a kid opening gifts on christmas day even though he just turned 55. I see too many 3d planes with big throws - what for - if the airplane is flying on the wing, big throws will just get you into trouble. you need big throws when you start flying on the control surfaces instead of the wing. hope this helps, more to follow, ray