I own the tower trainer RTF, but its engineless. I sent the engine to tower, where it got lost. The reason i am not angry is because all my clubmembers said to get a .46 FX, and i still havent got it, but i expect it to be fine. THe engine is great for the learning process, but dont try to put the engine on your second plane. I had trouble with my engine in a way that when ever i put the plane in a verticle position (Nose up), the engine quit. There was not enough pressure coming back from the exhaust. We checked that and it still didnt work. I broke in the engine according to all my club members and had it tuned every time i went to the field. I surely was a miss, not a hit.

Just my point of view.