If you get your CG back enough with the original rudder it knifes well. You guys have to remember that you can go way back with the CG before this plane dolphins. The more toward the tail the CG is the more 3D this little wonder becomes, the flatter the spins, the sharper it snaps, etc. I spent many hours working with moving it back on mine but mine was the kit and not the ARF which makes for a lighter SE. I can tell you that the further you get it back the less input you need from the rudder, so use that for fuel for thought and see what you can do to make it the most fun possible.