I am not having a lot of luck getting mine to 3d very well, it wont harrier and doing an upright elevator without a lot of wing rock has taken quite as bit of work to achive but it can be done. Inverted elevator is solid. I can get a couple of really tight waterfalls that are truly end over end but after two flips it falls to the side, upright flat spins but while it rotates flat it is not very tight and falls kinda fast. inverted flat spin okays but is very touchy and will fall out of the spin if everything is not just right. snaps are very good. But what really keeps me flying the katana is its Knife edge and roll capabilites. This plane flies very easily in knife edge and rolls are super crisp and responsive. Keep the elevator movement on low rate to around 15 degrees of movement for general flying, anymore may cause the plane to snap, if you setup high rates for 3d use plenty of expo. don't be scared of it just know its there and respect it. it doesnt take a lot of elevator for it do tight and fast aerobatics. i set my low rates to the point that a full up elevator input @ 3/4 throttle will not cause the plane to snap out of a loop. Plane lands fine, won't drop a wing until it has almost zero airspeed

good luck
zonk