I just received an Evolution 46 NX from Horizon Hobby as a replacement for the P.O.S. 46 NT that came with my Hangar 9 PNP 40 size Cub. Basically what are the main differences between the NX and NT and is this a decent engine. I'm a little nervous about flying with this engine as the last one was so unreliable I don't think I had a landing with the engine running. Even on the maiden flight the engine quit in less than a minute after take off. I want to install a Saito Fa 62 in it as soon as funds will allow. Any input is appreciated.