I just followed the kit instructions to the letter, and the plane flew off the board, another tip, be sure to seal the window edges well and I would recommend using an exhaust diverter, also pay close attention the the aileron rods, use the template to check for rod angle, it will help you with the throw differential and will help alot with the roll response, one good thing with the eagle 2 is that you can almost put any engine you want, I have an OS FP-40 in mine and it could use more power, I was thinking about a 61 4-stroke, there is plenty of plane to experiment with larger engines. another tip is to try to get a radio with mixing capability, it will help in tight turns