I use the 4* 60 to teach building but this is the first little 20 I have seen go together. I do tell some students about the 4* as a second plane choice, depends on how well the student flys the trainer. Some of my younger students were fantastic pilots and the 4* would have been too easy for them, others the 4* is the perfect plane. It's hard to find an easier plane to fly that will still stunt, the 4* is one of them. Thanks for doing a build thread on the 20, I may build one for one of my grandsons if yours flys well.