opjose, May I first say that your insight in this model will help me alot. I am about to venture in the building a Bobcat 50 and could use the advise. A few things, what servos are you using for the tail? Is a EVO .61 engine have enough power? ( I want to keep the plane lite) Also the exhaust, very interesting, how you do that? I am using the Robart retracts, and will do the mods you advised. Have attached the wing perm or can you remove the wings? Thank you