The Tower KAOS 40 ARF was my first 40 sized bird, after many electrics and 049-.15 glow birds. I did a "visibility" job on it so I could see it better, and it is currently powered with a Tower 46 BB, turning a Master Airscrew 11x6 Scimitar. (A 40 LA with a three blade prop is in the pic.) The performance is excellent, and like everyone says, it lands easier than a trainer. Fun bird. I'll always have at least one.