Thanks all you guys, I did not get the kit yet, just planning to buy, so if the kit can fix a side exhaust engine as Lotus72D said, that would be great becuase i can just fit in an OS engine.
JettEngine is too expensive for me.
many thanks navav2002 and bob27s, I will post build thread when I start to build my Aurora 25 and also will ask you guys many many questions I think, becuase this kit will be my first real kit to build, RC is my hobby for 20 years already(I am 30 years old now), but all I did before is reading, reading,reading, so this time is the time I really can do something,,,,,,,, I can not sleep everytime when I think about my incoming Aurora kit.
thank you guys again !!!!!!!!!