I've had this plane for about a year. powered by an OS 1.60 and an 18x6 prop. Flies very well, will not do any true 3D, lands rather fast with a gas engine in the nose. Check to see that the firewall is reinforced with the aluminum angle that came in the later models. If not, get some from the local hardware store and put it in. Use phillips screws countersunk in the firewall and the sides of the engine box. Secure with self locking (nylon insert) nuts.
Dan