BamBam-X- I just built a .40 Great Planes Cap 232 with an OS.50Sx and it is a 3D "MONSTER". But it is not an airplane you want to learn to 3D with, It is VERY sensitive with 50 degrees of throw on the elevator, but it will do every 3D maneuver there is! I know your looking for something to put that .30 on, check with pswany and see if a .30 would 3D his fat free taco, it also is a great 3D airplane. Hope this helps. Citation X