The Twist 3D was my second plane actually and I flew it for about three years. Finally dumb thumed her and now working on a World models Ultimate 40 I got two Christmas' ago. I'm retiring in 14 days and then I'll go ahead and finish it up. I'm using the OS 46FX I had on the Twist and believe me, it will fly the Twist fine. I'm using the muffler that came off of a Tower hobbies engine though, don't know it that makes it more powerful or not.