I maidened the Twist 150 yesterday with an OS 1.60FX turning an APC 18x6W prop, what a blast, this thing will do just about anything. It hovers at 1/2 throttle, I am not big into 3D but this plane makes things easy. I love the way the ARF is completed, the tail section goes together in seconds, start to finish in less than 6 hours.This plane would be fine on an OS 1.20AW good power with 12oz less weight.